| A | B |
| Ante | before |
| Antebellum | Of a period before a war, especially the American Civil War |
| Pre | Before |
| Antecedent | the noun to which a pronoun refers |
| Anterior | coming before in the position of time |
| Avant-garde | ahead of the times, especially in art |
| Vanguard | the foremost position especially of an army or fleet |
| Precept | a command; a rule of conduct |
| Predestination | the belief that what happens in human life has already been determined by some higher power |
| Preempt | to take possession of something before anyone else can do so |
| Premonition | a warning in advance |
| Preposterous | absurd; contrary to nature or reason |
| Pretentious | showy; |