| A | B |
| antagonize | verb; to make an enemy of; to oppose or counteract |
| appraisal | noun; an expert valuation; an assessment |
| apprise | verb; to inform; to notify |
| arable | adjective; fit for plowing; tillable |
| arbitrary | adjective; based on one's wishes or whims; random |
| archives | noun; a place where public records or historical records are kept; the records or documents kept in such a place |
| arduous | adjective; difficult; laborious |
| array | noun or verb; an orderly arrangement of persons or objects; to set in proper order |
| askew | adjective; lopsided; not in line |
| assail | verb; to attack violently; to assault |