- Anti virus software
- Anti-aircraft
- Anti-grammatical
- Anti-incumbent
- Anti-money laundering
- Antibiotic
- Anticipatory bail
- Anticoagulant
- Antidemocrat
- Antidote
- Antifreeze
- Antigen
- Antiperspirant
- Antiphon
- Antiseptic
- Antisocial
- Ants
- Ants in ones pants
- Antsy
- Aphid
- Aphrodisiac
- Apiology
- Apnoea
- Apocryphal
- Apodyopsis
- Apogee
- Apology
- Apophenia
- Apophysis
- Apoptosis
- Aporia
- Apostasy
- Apostate
- Applicability
- Application form
- Applies
- Applying
- Appointee
- Apportion
- Appraise
- Appraisement
- Appreciable
- Appreciated
- Aptitude test
- Aqua-lung
- Aquaponics
- Aquaris
- Aquarist
- Aquarium
- Aqueduct
- Aquiline
- Arab colonist
- Arabian
- Arabian sea
- Arable
- Arbitrate
- Arbitration
- Arbitrator
- Arbitrators
- Arbour
- Arc
- Arch-vault
- Archdeacon
- Archdiocese
- Archer
- Archetypal
- Archfiend
- Architect
- Architectonic
- Architectural
- Arid land
- Aristocratic families
- Arm -in-arm
- Armageddon
- Armament
- Armful
- Armless
- Armored
- Armorer
- Armory
- Armoured soldiers
- Armourer
- Armpit
- Army comprising elephants
- Aroint
- Around
- Arranged
- Arranging
- Arrant
- Array of clouds
- Arrears
- Arresting
- Arrival
- Arriving
- Articulate
- Artificer
- Artificial insemination
- Artificiality
- Artistically
- Artistry