| A | B |
| abacus | Chinese device used to perform arithmetic equations by moving beads along rods |
| abase | to degrade; to humiliate |
| abash | to make ashamed or uneasy |
| abate | to reduce |
| abbess | a woman, commonly called Mother Superior in charge of nuns |
| abdicate | to step down from a powerful position |
| abduct | to carry off a person; to kidnap |
| aberrant | straying from the correct or normal way |
| abet | to help someone do something illegal or wrong |
| abeyance | a state of not being presently used |
| abhor | to hate deeply; detest |
| abide | to remain; continue; stay; endure |
| abut | border upon; adjoin |
| abject | extremely sad; hopeless; defeated |
| abjure | to repudiate or renounce; to give up |
| ablution | a cleansing with water or liquid, as a religious ritual; the liquid used |
| abnegate | to deny oneself; to reject |
| abominate | to hate or loathe intensely |