| agnostic | one who does not know whether there is a God |
| amoral | neither moral nor immoral |
| anarchy | political disorder and confusion |
| anecdote | some interesting or humorous incident |
| anemia | a deficiency of red corpuscles in the blood |
| anesthetic | a drug causing one to be insensitive to pain |
| anomaly | a rare exception; something that is not normal |
| anonymous | having an unknown or unacknowledged name |
| asymmetrical | not having both sides exactly alike; not symmetrical |
| atheist | one who denies the existence of God |
| atypical | not typical |
| amorphous | having no fixed form or shape |
| analgesic | a type of drug that stops you from feeling pain; painkiller |
| apathy | behaviour that shows no interest or energy and shows that someone is unwilling to take action |
| atom | the smallest unit of any chemical element |
| ambience | the surrounding atmosphere |
| ambiguous | uncertain; having two possible meanings |
| ambitious | having a desire to succeed |
| amphitheater | an oval or round structure with tiers of seats around an open space |
| ambidextrous | able to use both hands |
| ambiguity | the quality of having two possible meanings |
| ambivalence | conflicting (both kinds of) feelings toward a person or thing |
| ambivalent | having conflicting (both kinds of) feelings toward someone or something |
| amphibian | an animal that lives both in the water and on land |
| amphibious | able to live or to travel both on land and in water |
| annals | a written accout of events year by year; historical records |
| anniversary | the yearly return of the date of some memorable events |
| annual | yearly; lasting only one year |
| annuity | an investment that provides fixed payments yearly or at the other regular intervals |
| biannual | semiannual; happening twice a year |
| biennial | occuring every two years |
| centennial | a hundredth anniversary |
| millenium | a period of thousand years |
| per annum | by the year; anually |
| perennial | having a life cycle lasting through more than two years |
| superannuated | beyond the year of retirement; retired because of age |
| anno Domini | A.D. |
| bicentennial | 200th anniversary |
| triennial | happening every three years |
| ante | the ammount each poker player must put into the pot before receiving his cards |
| antescedent | anything that logically goes before something else |
| antedate | to occur before something else |
| ante meridiem | before noon |
| anterior | located before or in front |
| anteroom | a room before the main room; a waiting room |
| anticipate | to realise before |
| antiquarian | one who collects or studies objects of former times |
| antiquated | so old as to be no longer useful |
| antique | belonging to an earlier (before) period |
| antiquity | ancient (before) times |