| A | B |
| aghast (think ghastly) | struck by amazement or terror |
| agoraphobia | an abnormal fear of open or public places |
| akin | of similar nature or qualities. |
| alleviate (AL/AD to + LEVI light) | to relieve; to lighten the burden or pain of |
| amalgamation | a union, a merger |
| amatory (AMAT love) | designed to excite love. |
| amiable (AM/AMAT love + -ABLE) | friendly, affable |
| amour (AM/AMAT love) | a love-affair, especially one of an illicit nature. |
| anathema (AN without or not + THEME idea) | anything forbidden, as by social usage. |
| animalcule (ANIMAL + CULE/CLE small) | an animal of microscopic smallness. |
| antechamber (ANTE before) | a waiting room |
| antemundane (ANTE before + MUND world) | pertaining to time before the world's creation. |
| antilogy (ANTI against + LOG word or reason) | inconsistency or contradiction in terms or ideas. |
| antiphony (ANTI opposite or against + PHON sound) | an anthem or other composition sung responsively. |
| antiquary (ANTE before) | one who collects and examines old things, as coins, books, medals, weapons, etc. |
| antistrophe (ANTI against) | the inversion of terms in successive classes, as in "the home of joy and the joy of home". |
| aperture | hole. |
| apex (APO up or away) | the highest point, as of a mountain. |
| aphorism | a short saying |
| apostasy (APO up or away + STA stop or stand) | a total departure from one's faith or religion. |
| apostate (APO up or away + STATE as in an idea) | a person who forsakes his religion, cause, party, etc |
| apparitional (think appear) | ghostly, spectral |
| appellate (appeal + ATE cause) | capable of being appealed to. |
| appellation | name; title |
| appertain (AP/AD to + pertain) | to belong, as by right, fitness, association, classification, possession, or natural relation. |