- Ancestry
- Ancient story
- Ancillary
- And a half
- And that's flat
- And the like
- And then
- And things
- And what is more
- Andirons
- Androcentricity
- Andropause
- Anhydride
- Anima
- Animadvert
- Animal
- Animalcule
- Animals
- Animated
- Animator
- Animosity
- Aniseed
- Ankle
- Anklet with bells
- Annals
- Anonymous letter
- Anorexic
- Another key
- Answer back to
- Answer for
- Antechamber
- Antennae
- Antepenultimate
- Anticipation
- Anticipative
- Antihelmintic
- Antihistamines
- Antilog
- Antilogarithm
- Antimacassar
- Antinomy
- Antiquity
- Antithesis
- Antithetical
- Antitype
- Antral gastritis
- Aphorism
- Apiculture
- Aplomb
- Apocalypse
- Apollo
- Apologetic
- Apologia
- Apologise
- Apologist
- Apophatic
- Apostacy
- Apostle
- Apothegm
- Apparatus
- Apparel
- Appealer
- Appealingly
- Appellant
- Appellation
- Appendicitis
- Appertain
- Appetise
- Appetite
- Apple of the eye
- Apprehend
- Apprehension
- Apprehensively
- Apprise
- Apprize
- Approachable
- Approbate
- Approbatory
- Approve
- Approving
- April
- Apriori
- Apriorism
- Apropos
- Apse
- Archive
- Archives
- Archivist
- Ardent
- Arduous
- Area manager
- Areal flood
- Aren't
- Argent
- Arguing
- Argumentation
- Arms
- Army corps
- Aroma
- Aromatic