| A | B |
| atypical (adj) | unusual |
| amorphous (adj) | shapeless |
| anarchy (n) | disorder; chaos resulting from no leadership |
| antediluvian (adj) | before the flood |
| anachronism (n) | something that occurs out of time |
| anagram (n) | a word or phrase formed using all the letters from another word or phrase |
| anathema (n) | anything greatly detested; a ban or curse |
| abdicate (v) | to step down from, give up a position |
| abstemious (adj) | moderate in use of food and drink |
| abstruse (adj) | difficult to understand |
| abscond (v) | to depart secretly and hide |
| absquatulate (v) | to move off hastily and secretly |
| aberration (n) | error; deviation from norm |
| archetype (n) | first of its kind |
| prototype (n) | archetype |
| amphitheater (n) | circular theater |