| A | B |
| Ali- | other |
| alibi | other story for what you are doing |
| alien | other species of people |
| alias | other name |
| Ante- | before |
| antecedent | a word that come before another word |
| antebellum | before the war |
| Anti- | against |
| antifreeze | something that stops things from freezing |
| antiseptic | something that kills germs |
| antibody | somthing that fights against disease |
| Audi- | to hear or listen |
| audiovisual | something you can hear and see |
| auditorium | a place you go to hear something |
| audible | something that you are able to hear |
| audience | a group of people hearing something |
| Auto- | self |
| Automatic | runs by itself |
| automobile | a carriage that runs by itself-no horses. |
| autograph | writing the name of yourself. |