Topics by letter A

  1. alligator and crocodile
  2. able and capable
  3. ale and beer
  4. allergy and common-cold
  5. advertising and marketing
  6. almonds and peanuts
  7. assemble and coalesce
  8. atom and electron
  9. alienation and disposal
  10. authentic and genuine
  11. alone and lonely
  12. affect and effect
  13. agreement and contract
  14. aids and hiv
  15. amphetamine and cocaine
  16. animation and cartoon
  17. android and apple
  18. algebra and trigonometry
  19. arteriosclerosis and atherosclerosis
  20. aldose and ketose
  21. angel and ghost
  22. accurate-measurement and precise-measurement
  23. arson and incendiary
  24. actor and waiter
  25. anxious and excited
  26. aggression and assertion
  27. amphibian and reptile
  28. able and willing
  29. anarchist and fascist
  30. abundant and greedy
  31. article and purview
  32. algeria and morocco
  33. accord and bestow
  34. attractive and magnetic
  35. antiphrasis and antithesis
  36. arrogant and confident
  37. antinomy and oxymoron
  38. adventurous and intrepid
  39. alpacas and llamas
  40. articulate and eloquent
  41. aporia and malapropism
  42. acceleration and velocity
  43. al-qaeda and taliban
  44. age and generation
  45. adam-smith and karl-marx
  46. adage and proverb
  47. average and median
  48. art and nudity
  49. associate and conflate
  50. ambiguity and uncertainty
  51. atrophy and deteriorate
  52. absolve and vindicate
  53. acquit and exonerate
  54. array and plethora
  55. annulment and divorce
  56. accord and congruence
  57. agitate and irritate
  58. apple and fenland
  59. ambiance and atmosphere
  60. algebra and arithmetic
  61. alienate and ostracize
  62. attorney and lawyer
  63. anxiety-attack and hot-flash
  64. accuracy and precision
  65. ale and lager
  66. apartment and condo
  67. attain and obtain
  68. autotroph and heterotroph
  69. adhesion and cohesion
  70. aerobic and anaerobic
  71. affidavit and declaration
  72. aristotle and plato
  73. antiperspirant and deodorant
  74. absolute and relative
  75. ape and gorilla
  76. anger and rage
  77. adhd and bipolar-disorder
  78. argumentative and discursive
  79. agp and pci
  80. apa and mla
  81. asthma and bronchitis
  82. attorney and paralegal
  83. acrylic and enamel
  84. aquamarine and topaz
  85. anxiety and fear
  86. accountant and auditor
  87. allergy and asthma
  88. arthritis and tendonitis
  89. asthma and pneumonia
  90. anxiety and stress
  91. average and mean
  92. accountant and bookkeeper
  93. asthma and bronchiolitis
  94. affirmation and prayer
  95. analog and digital
  96. ampule and vial
  97. ajax and javascript
  98. appreciation and gratitude
  99. america and china
  100. assurence and audit
  101. agnostic and atheist
  102. allot and alot
  103. act-of-god and natural-disaster
  104. award and reward
  105. acceptance and tolerance
  106. atom and ion
  107. allopathic and osteopathic
  108. average-basis and average-rate
  109. anion and cation
  110. altar and alter
  111. arbitration and litigation
  112. arbitration and mediation
  113. addiction and dependence
  114. appropriation and authorization
  115. ant and termite
  116. anxiety and depression
  117. animation and animatronics
  118. add and adhd
  119. addiction and compulsion
  120. aluminum and steel
  121. advil and aleve
  122. amortization and depreciation
  123. alpha and omega
  124. advertising and public-relations
  125. anaesthesia and analgesia
  126. artistic and creative
  127. astronomy and astrophysics
  128. alienation and estrangement
  129. azalea and rhododendron
  130. awol and desertion
  131. anger and hostility
  132. ascii and binary
  133. anxiety-disorder and panic-disorder
  134. appetite and hunger
  135. abundance and wealth
  136. assertive and pushy
  137. among and between
  138. ampere and kilowatt
  139. arid and drought
  140. autism and gifted
  141. abnormality and normality
  142. arid and dry
  143. admissibility and relevance
  144. affront and offend
  145. abstract and concrete
  146. abscissa and domain
  147. abase and abate
  148. after and afterward
  149. artery and vein
  150. ambiguity and risk
  151. alternator and generator
  152. algorithmic and formulaic
  153. awning and canopy
  154. appoggiatura and elliptical
  155. anarchy and disestablishmentarianism
  156. aristocracy and feudalism
  157. actor and actress
  158. algae and angiosperm
  159. affection and love
  160. asbestosis and mesothelioma
  161. autism and cerebral-palsy
  162. assurance and insurance
  163. action and reaction
  164. ambition and aspiration
  165. aspiration and desire
  166. arthritis and gout
  167. although and despite
  168. aim and requirement
  169. aa and na
  170. achiever and dreamer
  171. apple and quince
  172. accident and incident
  173. abase and abash
  174. asynchronous and synchronous
  175. aspiration and inspiration
  176. apr and note rate
  177. art and design
  178. asthma and chronic-bronchitis
  179. allegory and analogy
  180. arena and stadium
  181. assuage and attenuate
  182. angiosperm and moss
  183. acciaccatura and appoggiatura
  184. annuity and perpetuity
  185. ascii and unicode
  186. arabic and farsi
  187. anti-rationalism and rationalism
  188. atelectasis and emphysema
  189. asbestosis and pleural-plaques
  190. asbestos and fiberglass
  191. asbestosis and emphysema
  192. asbestosis and silicosis
  193. asbestosis and pulmonary-fibrosis
  194. apparel and clothing
  195. admire and envy
  196. anemia and hemophilia
  197. adenoma and polyp
  198. arthritis and bursitis
  199. arthritis and rheumatoid-arthritis
  200. adhd and autism
  201. acid-reflux and heartburn
  202. arena and colliseum
  203. arena and field-house
  204. advance and advancement
  205. accrued-revenue and deferred-revenue
  206. asthma and copd
  207. altruistic and amiable
  208. arrogant and haughty
  209. adenoma and carcinoma
  210. acid-reflux and ulcer
  211. ambiguity and vagueness
  212. assurance and audit
  213. audit and review
  214. arrogant and contemptuous
  215. assessment and evaluation
  216. assessment and screening
  217. apple and orange
  218. assault and battery
  219. abatement and remediation
  220. abatement and exemption
  221. abrogate and overrule
  222. accomplice and conspirator
  223. accounts-payable and accounts-receivable
  224. accretion and amortization
  225. anionic-polymarization and cationic-polymarizion
  226. awesome and awestruck
  227. arrow-root and casava
  228. absurdism and existentialism
  229. autobiography and memoir
  230. agave and honey
  231. agriculture and farming
  232. acrylic and polyester
  233. adoration and appreciation
  234. apple-ipad-3 and apple-ipad2
  235. ability and qualified
  236. authorize and entrust
  237. antique and curio
  238. austerity and thrifty
  239. aeroplane and aircraft
  240. alternating-current and direct-current
  241. assumption and proposition
  242. adjective and adverb
  243. arenas and stadium
  244. acrylic and polystyrene
  245. accusation and allegation
  246. autotrophic-eukaryotes and hetrotrophic-eukaryotes
  247. assumption-of-risk and volenti-non-fit-injuria
  248. aquired-immunity and natural-immunity
  249. absolute-assignment and collateral-assignment
  250. appraised-value and assessed-value
  251. abdominoplasty and abdominoscopy
  252. abdominoplasty and tummy-tuck
  253. abdominoplasty and lipoplasty
  254. acetaminophen and ibuprofin
  255. allergic-conjunctivitis and pink-eye
  256. alopecia and male-pattern-baldness
  257. analgesia and analgesic
  258. antibiotic and probiotic
  259. assumption and principle
  260. antisocial-personality-disorder and multiple-personality-disorder
  261. antisocial and introvert
  262. apheresis and blood-transfusion
  263. astigmatism and cataracts
  264. asymmetry and symmetry
  265. anxiety and bipolar
  266. alpha-hydroxy-acid and retinol
  267. acid-rinse and skin-peel
  268. algae and seaweed
  269. ayurveda and traditional-chinese-medicine
  270. assurance and reinsurance
  271. animal-antibiotics and human-antibiotics
  272. attitude and personality
  273. attitude and disposition
  274. abdominoplasty and panniculectomy
  275. anterior-resection and ap-resection
  276. anterior-resection and hartmann-procedure
  277. aquit and exonerate
  278. ailment and malady
  279. adenocarcinoma and mesothelioma
  280. accutane and acne-laser-treatment
  281. accutane and retin-a
  282. accutane and spironolactone
  283. annuity-settlement and lump-sum
  284. anglicana and orthodox
  285. anger and passion
  286. allergy and illness
  287. allograft and autograft
  288. adaptive and responsive
  289. arborizing-veins and spider-veins
  290. adware and malware
  291. apple-brandy and pomance-brandy
  292. anonymous-function and closure
  293. arthritis and osteoarthritis
  294. avant-garde and futurism
  295. avante-garde and odalisque
  296. arena and music-hall
  297. ameliorate and pacify
  298. arid and sere
  299. adam-smith and john-maynard-keynes
  300. adviser and benefactor
  301. advise and exhort
  302. avante-garde and forefront
  303. avante-garde and metropolis
  304. adapt and adopt
  305. avante-garde and courtesan
  306. await and wait
  307. argue and wrangle
  308. abide and resided
  309. annuity and structured-settlement
  310. ascertain and assert
  311. annuity and installment-note
  312. annuity-due and immediate-annuity
  313. absolutism and dogmatic
  314. a-cash-balance-benefit-program and a-defined-benefit-program
  315. authoritarianism and dogmatic
  316. activty-diagram and sequence-diagram
  317. analysis and synthesis
  318. abstraction and encapsulation
  319. allele and gene
  320. ass and donkey
  321. aim and purpose
  322. axiom and hypothesis
  323. absolutism and totalitarian
  324. advocate and recommend
  325. affluent and wealthy
  326. aware and mindful
  327. apple and banana
  328. aramids and polyamide
  329. aristocracy and oligarchy
  330. annuity and lump-sum-payment
  331. aristocracy and monarchy
  332. amenities and facilities
  333. axiology and metaphysics
  334. army and military
  335. attribute and characteristic
  336. abhor and hate
  337. aspect and characteristic
  338. access-2013 and dbase-8-plus
  339. alpha-hydroxy and retinol
  340. agreement and protocol
  341. amazing and phenomenal
  342. agreement and legal-protocol
  343. adopt and pass
  344. assyria and persia
  345. agile and rup
  346. abnormal and irregular
  347. analingus and cunnalingus
  348. animals and people
  349. aid and amenity
  350. amenity and appliance
  351. allele and trait
  352. alexander and marcus
  353. ascus and basidium
  354. anode and cathode
  355. abate and attenuate
  356. alleviate and attenuate
  357. aspnet and php
  358. arts and athletics
  359. ambition and apirant
  360. alicit and derive
  361. auber and wasp
  362. ambivalence and contradiction
  363. aware and conscious
  364. ambigious and cryptic
  365. ambiguous and cryptic
  366. aquitted and not-guilty
  367. acquit and not-guilty
  368. assume and surmise
  369. altruitic and magnanimous
  370. altruistic and magnanimous
  371. advil and motrin
  372. animal and human
  373. alice and andrew
  374. american-pear and korean-pear
  375. air-mattress and coil-mattress
  376. acrylic and mylar
  377. arthritis and pseudogout
  378. administration and management
  379. axiom and construct
  380. adsl and dsl
  381. arse and elbow
  382. advil and alive
  383. apple and taco
  384. annoyed and irritated
  385. accrual and entitlement
  386. antibodies and immunoglobulin
  387. actor and thespian
  388. aquaeous-humor and vitreous-humor
  389. aqueous-humor and vitreous-humor
  390. an-art-gallery and museum
  391. art-gallery and museum
  392. abb and sbb
  393. adjective and attribute
  394. alzheimers and dimensia
  395. android and iphone
  396. alzheimers and senile-dementia
  397. anemia-of-chronic-disease and pernicious-anemis
  398. anemia-of-chronic-disease and pernicious-anemia
  399. android-cell-phone and apple-cell-phone
  400. aeroplane and jet
  401. apprehend and grasp
  402. alpha-hydroxy-acids and retinol
  403. acid and lsd
  404. arrogance and confidence
  405. arrogance and pride
  406. assign and delegate
  407. affliction and misfortune
  408. aeroplane and helicaptor
  409. aeronautical and mechanical
  410. aeronautical-field and mechanical-field
  411. apple and white
  412. agoraphobia and social-phobia
  413. ambitious and driven
  414. agitated and irritated
  415. arrogant and egotistical
  416. and and of
  417. almond and penut
  418. ask and question
  419. acquit and justify
  420. alternator and motor
  421. audience and spectator
  422. attrition and detrition
  423. appreciation and expectation
  424. anticipate and expect
  425. adoration and love
  426. antibiotics and toxins
  427. adherence and adhesion
  428. acquire and obtain
  429. apple-ipad-computer and apple-macbookpro-computer
  430. assessment and review
  431. algebraic-expression and polynomial
  432. acerbic and acrid
  433. acidulous and acrimonious
  434. ardent and vehement
  435. adb-port and serial-port
  436. adb-port and appletalk
  437. abs and arms
  438. apple-imac and apple-pro
  439. angiography and arteriogram
  440. apple-i-phone-5 and galaxy-s4
  441. agile and ductile
  442. amish and mennonite
  443. absolutist and fanatic
  444. autocracy and commonwealth
  445. apricots and peaches
  446. apple and pear
  447. apple and batman
  448. aashray and umeed
  449. apricot and peach
  450. amend and mend
  451. agitation and irritation
  452. agitation and friction
  453. agitation and pain
  454. agitation and lubricity
  455. agitation and restlessness
  456. agitation and boredom
  457. agriculture and former
  458. autocrat and despot
  459. antihistamine and sudafed
  460. antihistamine and decongestant
  461. axiom and law
  462. acerb and acerbic
  463. apr and lar
  464. apple-iphone-5c and samsung-galaxy-s4
  465. apartment and studio-apartment
  466. ataxia and atrophy
  467. affable and amiable
  468. alu and cpu
  469. acetominophen and ibuprophen
  470. adverb and conjunction
  471. atomic-bomb and nuclear-bomb
  472. anthropology and archaeology
  473. apple-cider and apple-juice
  474. asynchronous and syncronous
  475. atypical and typical
  476. atypical and non-conformist
  477. ambiguous and vague
  478. apple and samsung
  479. avenge and revenge
  480. abate and abridge
  481. agile and nimble
  482. alzheimers and dementia
  483. adam-smith and karl-heinrich-marx
  484. awareness and consciousness
  485. atomic-mass and atomic-weight
  486. arminian and reformed
  487. almond-milk and soy-mild
  488. almond-milk and soy-milk
  489. asteroid and meteor
  490. autotrophs and heterotrophs
  491. am-radio and fm-radio
  492. agate and onyx
  493. active-ftp and passive-ftp
  494. agate and onzy
  495. agate and onxy
  496. auspicious and propitious
  497. answers and findings
  498. answer and finding
  499. attack and reproach
  500. aspect and thing
  501. anxiety and frustration
  502. accordion and concertina
  503. arena and coliseum
  504. apparatus-gymnastics and tumbling
  505. agreeable and discordant
  506. antithesis and paradox
  507. aphorism and epigram
  508. area and arena
  509. accountance and accounting
  510. accountancy and accounting
  511. accounting and bookkeeping
  512. astimatism and cataract
  513. american-days and romanian-days
  514. autonomy and self-determination
  515. arartment and house
  516. apartment and house
  517. adhere and comply
  518. analgesic and anesthesia
  519. acquitted and innocent
  520. aliens and demons
  521. axe and hammer
  522. arsonist and pyromaniac
  523. abuse and misuse
  524. arrogant and braggart
  525. apple and presumptuous
  526. apple and complacent
  527. abate and abdicate
  528. apple-tree and banana-tree
  529. ak47 and ak74
  530. apathy and empathy
  531. arena and fieldhouse
  532. arrogant and self-center
  533. architect and architectural-engineer
  534. allow and permit
  535. aggravation and agitation
  536. arcane and esoteric
  537. act and sat
  538. activity-diagram and flow-chart
  539. apes and monkeys
  540. amelia-earhart and the-wright-brothers
  541. android and apple-company
  542. apart and away
  543. antecedent and predecessor
  544. attached and enclosed
  545. assumption and belief
  546. atom and molecule
  547. acrylic-fabric and polyester-fabric
  548. ancient-greek and greek
  549. assignment and set-over
  550. abogated and abogating
  551. azithromycin and erythromycin
  552. arrogant and pompous
  553. agriculture and husbandry
  554. applied-linguistics and syntax
  555. admissibility and relevancy
  556. absolustism and autocracy
  557. applied-science and pure-science
  558. autonomy and freedom
  559. arcylic and cellulose-acecate
  560. augumented-reality and virtual-reality
  561. augumented-reality and mixed-reality
  562. american-central-business-district and european-central-business-district
  563. apple and ravine
  564. agreeable and amenable
  565. arrogant and self-assured
  566. application-programming-interface and database
  567. alternative and option
  568. array and vector
  569. aim and objective
  570. announcement and enunciation
  571. ageing-oven and annealing-furnace
  572. answer and problem
  573. apparatus and device
  574. acetal and nylon
  575. algeria and algiers
  576. angina and atherosclerosis
  577. australian-shephard and border-collie
  578. advil and ibuprofen
  579. adam-smith and john-keynes
  580. algebra and calculus
  581. aneurysm and embolism
  582. analogy and parable
  583. accounts-receivable and billing-collections
  584. advice and advise
  585. a and one
  586. admonish and castigate
  587. apple and stupidity
  588. android and windows
  589. affirmation and oath
  590. affidavit and affirmation
  591. affirmation and declaration
  592. a-little and little
  593. apple-imac and macbook-pro
  594. ambiguous and ambivalent
  595. atheism and skepticism
  596. adam-smith and john-stuart-mill
  597. acerbic and acrimonious
  598. assessment and estimate
  599. access and hills
  600. autogenous-welding and mig-welding
  601. abbreviation and acronym
  602. attitude and belief
  603. aaron-beck and bf-skinner
  604. autotrophs and hetrotrophs
  605. auk and penguin
  606. auk and cormorant
  607. acquired and enquired
  608. ashlee-simpson and jessica-simpson
  609. assume and presume
  610. academic-specialty and academic-track
  611. aristocracy and totalitarianism
  612. aw-of-diminishing-returns and ceteris-paribus
  613. asthenosphere and lithosphere
  614. aspiration and expectation
  615. assassination and murder
  616. asynchronous-transfer-mode and frame-relay
  617. accept and except
  618. allusion and illusion
  619. any-one and anyone
  620. assure and insure
  621. assure and ensure
  622. apprehensive and ominously
  623. antihistamines and decongestant
  624. abstract-class and inheritance
  625. adjacents and consectutive
  626. activated-complex and reaction-intermediate
  627. approach and strategy
  628. a and orange
  629. actual-cash-value and fair-market-value
  630. apparel and fashion
  631. ambivalence and paradox
  632. aa and na
  633. abate and remediate
  634. abatement and remeidation
  635. alive and live
  636. acquitted and not-guilty
  637. acrylic-nails and gel-nails
  638. acrylic and gel
  639. angiogram and arteriogram
  640. allusion and delusion
  641. altruism and generosity
  642. alittle and little
  643. apple-iphone-5c and galaxy-s5
  644. affirm and warrant
  645. apple-5c and samsung-galaxy4
  646. abraxane and taxetere
  647. awesome-guy and cool-guy
  648. asphalt and macadam
  649. abundant and redundant
  650. antecedent and anterior
  651. antecednt and anterior
  652. asthma and bronchialitis
  653. acrylic-fiber and polyester-fiber
  654. apple-is-solid and orange-is-juicey
  655. arc-lamp and light-bulb
  656. annuity-due and ordinary-due
  657. appliance and gadget
  658. analysis and deductuve-reasoning
  659. accounts-receivable and collections
  660. anorexia and bulimia
  661. amnion and placenta
  662. android-tablet and windows-8-tablet
  663. abraham-lincoln and barrack-obama
  664. apprentice and novice
  665. apple and name
  666. apprentice and protege
  667. appreciation and commendation
  668. advertising and promoting
  669. ayurveda and tcm
  670. alaskan-husky and siberian-husky
  671. apple and car
  672. apple and red
  673. admirable and admiring
  674. almond and peanut
  675. adolf-hitler and josef-stalin
  676. animal-cell and plant-cell
  677. anthroplogy and archeology
  678. acteminophen and ibuprofen
  679. all-wheel-drive and four-wheel-drive
  680. arlene and emma
  681. arlo and emma
  682. assiduous and industrious
  683. arcade and gallery
  684. arcade and colonnade
  685. army and marines
  686. anxious and aprehensive
  687. apprehend and comprehend
  688. adapt and adept
  689. anxious and apprehensive
  690. average and typical
  691. activity-diagram and sequence-diagram
  692. agricultural-science and agriculture-or-farming
  693. australia and united-stages
  694. australia and united-states
  695. analog-multimeter and digital-multimeter
  696. airconditioner and dehumidifier
  697. apples and orange
  698. astral and celestial
  699. acute-eczema and contact-dermatitis
  700. alpha-hydroxy and hyluronic-acid
  701. algae and angiosperms
  702. atomic-bomb and hydrogen-bomb
  703. asteroid and comet
  704. apartment and condomedium
  705. axiology and epistemology
  706. axiology and logic
  707. acerbic and cynical
  708. antihhistimine and decongestant
  709. apple-5c and galaxy-s5
  710. apple and mel-brooks-the-producers
  711. apple and mel-brooks
  712. abuse and rebuke
  713. apples and oranges
  714. ambiguous and nebulous
  715. accontant and cashier
  716. accountant and cashier
  717. aristocrat and noble
  718. advil and asprin
  719. attribute and chatacterics
  720. automobile and automotive
  721. alveoli and bronchioles
  722. aspirin and ibuprofin
  723. austarlia and congo
  724. australia and congo
  725. apartel-condominium and resort
  726. allogation and disclosure
  727. apple and smsung
  728. alleviate and ameliorate
  729. alteration and reconfiguration
  730. alteration and re-configuration
  731. arrange and organize
  732. antisocial and intrevert
  733. ab and ap
  734. american-psychological-association and modern-language-association
  735. arthritis and bursitus
  736. abase and debase
  737. apple-4s and samsung-galaxy-s4
  738. alliance and confederation
  739. arrogant and egocentric
  740. anterior-resection and sigmoid-colectomy
  741. autonous-clg and government-clg
  742. able and compare
  743. autonomy and independent
  744. a-h-ayer and c-l-stevenson
  745. aj-ayer and cl-stevenson
  746. autarch and dictator
  747. avodart and proscar
  748. agitated and irritable
  749. astigmatisum and stigmatisum
  750. apple and furnace
  751. amenity and facilities
  752. amenity and facility
  753. apple and microsoft
  754. arenas and theaters
  755. africa and america
  756. anarchy and oligarchic
  757. allegation and averement
  758. acrylic and nylon
  759. asteroid and meteoroid
  760. asteroid and planetoid
  761. abate and alleviate
  762. adsense and amazon-associate
  763. android and ios
  764. absolute-assignment and irrevocable-assignment
  765. africa and asia
  766. amoral and immoral
  767. abolish and demolish
  768. assumption and consideration
  769. absolutist and c
  770. aerobic-exercise and fitness-exercise
  771. america and india
  772. apple and melon
  773. american-revolution and columbus
  774. american-revolution and political-culture-during-the-time-of-columbus
  775. apple and book
  776. apple and google
  777. assuage and palliate
  778. against-immigration and for-immigration
  779. absolute-age and relative-age
  780. atom and quark
  781. aweber and mailchimp
  782. adolf-hitler and kim-jung-il
  783. allegory and metaphor
  784. alien and people
  785. all and whole
  786. auspicious and suspicious
  787. activity-diagram and state-diagram
  788. amoxicillian and pennicillian
  789. amoxicillin and penicillin
  790. apheresis and transfusion
  791. anthropology and natural-sciences
  792. amorous and horny
  793. amateur and professional
  794. apropos and pertinent
  795. assassinate and murder
  796. americans and diebetes
  797. astute and incisive
  798. acute and ingenious
  799. acute and incisive
  800. ambiguity and opportunity
  801. abstruse and subtle
  802. anaphora and polysyndeton
  803. antinomy and paradox
  804. angiogram and angioplasty
  805. abeyance and abjure
  806. avodart and finasteride
  807. at and in
  808. aptitude and dexterity
  809. acrylic-paint and enamel-paint
  810. air-mass and front
  811. admiration and desire
  812. admire and desire
  813. ada and derin
  814. affidavit and contract
  815. alluvial-plains and sea-stacks
  816. approve and authorise
  817. argumentative-writing and discursive-writing
  818. affidavit and certificate-of-compliance
  819. affidavit and compliance-certification
  820. anthroposystem and ecosystem
  821. association and club
  822. atorvastoma and crestor
  823. aggravate and exacerbate
  824. affiliate and merchant
  825. alpaca and llama
  826. alpha-hydroxy-acid and glycolic-acid
  827. attributes and characteristics
  828. affection and tenderness
  829. accommodate and helpful
  830. affect and emotion
  831. allograft and alloplast
  832. aisle and lane
  833. asbestos and emphysema
  834. alligator and crocodiles
  835. apple and life
  836. apple and oranges
  837. abnormal and bizarre
  838. adaptive-immunity and inflammation
  839. amd and intel
  840. alveolar and fricative
  841. ac-motor and dc-motor