- acoustic phenomenon
- approximate range
- amniotic cavity
- antrum
- archenteron
- ambiguously
- arecaceae
- apple blight
- apple canker
- American holly
- american smokewood
- alder buckthorn
- alder dogwood
- ambivalence
- ambivalency
- affaire d'honneur
- auditory sense
- auditory modality
- anneal
- archaicism
- archaism
- attune
- adjust text mode
- affixed
- allegorist
- agdistis
- age old
- age long
- age limit
- automatisation
- amalgamated
- acetylation
- assignment statement
- assimilate a book thoroughly
- age_old
- antiquitist
- activated
- activase
- ameliorating
- alchemical
- animalia
- achromatization
- asgittal curvature index
- ash tray
- alchemistical
- alidade
- ally with
- accidental or extraneous
- alcoholism abuse
- alcoholized iron