| A | B |
| anacanth | a group of teleostean fishes without spiny fin-rays |
| asbestos | a heat-resistant fibrous silicate mineral used in fire-resistant and insulating materials |
| ascetic | characterized by severe self-discipline and abstention from all indulgences, especially for religious reasons |
| asphyxia | a condition arising when the body is deprived of oxygen; suffocation |
| astigmatism | a visual defect preventing light from meeting at a common point |
| astronomy | the branch of science dealing with space and the physical universe |
| asylum | shelter or protection from danger |
| atheist | someone who denies the existence of God or gods |
| Anabaptist | a Protestant sect which rejected child baptism and insisted adults be rebaptized as a witness to faith |
| anachronism | a thing approrpiate to another time and place; conspicuously old-fashioned |
| anacoluthon | a sentence or construction that lacks grammatical sequence |
| anacrusis | one or more unstressed syllables at the beginning of a verse |
| anemia | a deficiency of red blood cells in the blood |
| anagram | a word, phrase, or name formed by rearranging the letters of another word, phrase, etc. |
| analgesia | a deadening, absence, or inability to feel pain |
| anarchy | a state of disorder due to absence or non-recognition of authority |
| anathema | something or someone that one vehemently dislikes; a formal curse of excommunication or denunciation |
| apocryphal | of doubtful authenticity; false, spurious |
| analytical | skilled in thinking or reasoning |
| atrophy | not to grow; to waste away |
| amphibious | able to live in both water and on land |
| mnemonic | relating to memory |
| pantheon | the entire group of gods (or perhaps exalted persons) |
| pantomine | a figurative transfer of a play without words with expression conveyed by gesture |
| antipodal | durectly opposed or contrary |
| anaology | a likeness or similarity in a certain, limited number of details |
| antibiotic | a substance produced by micro-organisms that destroys germs |
| anatomy | the science of structure of plants and animals based on dissection |
| apotheosize | to exalt to the rank of a god; glorify |
| catalytic | (figurative) causing change |
| dialogue | a conversation |
| pandemonium | wild uproar or disorder |
| amnesty | a pardon granted for past offenses; a forgetting or intentional overlooking |
| apogee | point farthest from earth in orbit; (figurative) highest point or peak |