- adelie land
- andrew johnson
- alexander selcraig
- alexander selkirk
- alexandrite
- alfred edward housman
- alfred eisenstaedt
- a jaw_breaker (said of a word difficult to pronounce)
- aroyl
- anne bradstreet
- anne dudley bradstreet
- apostelic father
- anosmatic
- anorthoclase
- arthur robert ashe
- a gate_keeper
- amman
- as the crow is
- at the mercy of
- any moment now
- a very suspicious man
- antoine laurent lavoisier
- an incense stick
- a darn sight better than
- arbo virus
- acanthion
- anterior horn
- as needed
- as red as a beet
- aegle marmelos
- atopen
- androgenic potential
- androgen_secreting neoplasm
- androgenicity
- aortopulmonary fenestration
- acute hemorrhagic encephalitis
- an emotional wound
- ameboid
- amoeban
- amoebic
- ameban
- alveolar rhabdomyosarcoma
- andrew lloyd webber
- Anabaptist
- asia minor
- alcoholic fermentation
- atlantic bonito
- acute pyogenic meningitis
- acute parenchymatous tonsillitis
- acute glossitis