| A | B |
| Absence | State of being away or not being present |
| Absorption | The act of absorbing |
| Abundant | Present in great quantity, more than adequate, welcome |
| Acceptable | Pleasing to the receiver; satisfactory; agreeable; welcome |
| Accidently | Happening by chance, not planned; unexpected |
| Accommodation | Adjusting of differences; reconciliation |
| Accompaniment | A part in a composition designed to serve as background and support for more important parts |
| Accurate | Free from error or defect; consistent with a standard, rule or model; precise; exact |
| Accustomed | To familiarize by custom or use; habituate |
| Achievement | Something accomplished, especially by superior ability, special effort, great courage |
| Acquaintance | A person known to one, but usually not a close friend |
| Actuality | Actual existence; reality |
| Adequately | As much or as good as necessary for some requirement or purpose; fully sufficient, suitable, or fit |
| Administration | The management of any office, business, school or organization |
| Adolescent | Immature, young |
| Aggressive | Characterized by or tending toward unprovoked offensives, attacks, invasions, or the like |
| Agriculture | The science, art or occupation concerned with cultivating land, raising crops, and feeidng, breeding, and raising livestock; farming |
| Amateur | A person who engages in a study, sport, or other activity for pleasure rather than for financial benefit or professional reason |
| Ambassador | A diplomatic minister of the highest rank, accredited as permanent representative to another country or sovereign |
| Analysis | This process as a method of studying the nature of something or of determining its essential features and their relations |