- Antagonistic
- Antares
- Anteater
- Antebellum
- Antecedence
- Antenna
- 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
- Apprehensible
- Appropriately
- Appropriateness
- Appropriation
- Approver
- Approximate
- Appulse
- Appurtenance
- Apron
- Apsidiole
- 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
- Arrows
- Arse over tit
- Arsenic
- Arsis
- Arson
- Art
- Art of creating new meaning by deleting one word
- Art work
- Artesian well
- Articles
- As far as in me lies
- As follows
- As gay as a lark
- As it were
- As much
- As much as
- As never before
- Ascension
- Ascertained
- Ascetics
- Asclepias acida
- Ascribe
- Asexual
- Ashamedly
- Ashen
- Ashes