- Anti-semitic
- Antibody
- Antic
- Antichrist
- Anticipation
- Anticipative
- Antihelmintic
- Antihistamines
- Antilog
- Antilogarithm
- Antimacassar
- Antinomy
- Antiquity
- Antithesis
- Antithetical
- Antitype
- Antral gastritis
- Anxiety
- Anxious
- Anxiousness
- Any day
- Any small bird
- Anything
- Anything solid
- Anythink
- Apathetic
- Apercu
- Aphemia
- 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
- Appliance
- Application
- Applied mathematics
- Applied science
- Appositely
- Appositeness
- Apprehend
- Apprehension
- Apprehensively
- Apprise
- Apprize
- Approachable
- Approbate
- Approbatory
- Approve
- Approving
- April
- Apriori
- Apriorism
- Apropos
- Apse
- Aquatic animal
- Arabian sweat-meat
- Arapaima
- Arbitrage
- Arbitrarily
- Arbitrariness
- Arbitress
- Arboured
- Arcanum
- Arch
- Arch-work
- Archaeological
- Archaeology
- Archaic
- Archaism
- Archbishopric
- Archeology
- Archipelago
- Architecter
- Architecture
- Archive
- Archives
- Archivist
- Ardent
- Arduous
- Area manager
- Areal flood