| A | B |
| Asylum- | a mental hospital or similar institution; refuge; a place of safety |
| Atone- | to make amends |
| Atrophy- | to wither away; to decline from disuse |
| Attest- | to give proof of; to declare to be true or correct; to give testimony |
| Attribute- | to credit to or assign; to ascribe |
| Augur- | to serve as an omen or be a sign ; to predict or foretell |
| August- | inspiring admiration or awe |
| Auspices- | protection; support; sponsorship |
| Auxiliary- | secondary; additional; giving assistance or aid |
| Avail- | to help; to be of use; to serve |
| Avant-garde- | the vanguard; members of a group, especially of a literary or artistic one, who are at the cutting edge of their field |
| Aversion- | a strong feeling of dislike |
| Avert- | to turn away; to prevent |
| Avid- | eager; enthusiastic |