| A | B |
| alien | foreign, unfamiliar, not natural; a foreigner, stranger |
| ally | to join together or unite for a common purpose; a person united with another for a common purpose; a friend |
| alternate | to follow by turns; to take turns; a substitute |
| anguish | great mental or physical suffering; agony; distress |
| anticipate | to look forward to; to expect |
| antiseptic | capable of preventing infection; sterile |
| approximate | nearly correct or exact; to come close to; to come near |
| audible | loud enough to be heard |
| authentic | genuine; reliable |
| avert | to prevent; to keep from happening; to turn away |