- Antidemocrat
- Antidote
- Antifreeze
- Antigen
- Antiperspirant
- Antiphon
- Antiseptic
- Antisocial
- Ants
- Ants in ones pants
- Antsy
- Anxiety disorders
- Any
- Any day now
- Anyplace
- Anything but
- Anything small
- Anyway
- Aourora
- Apathy
- Apepsy
- Aperture
- Apex
- Appalled
- Appalling
- Apparently
- Appeal
- Appearance
- Appeasement
- Append
- Applaud
- Apple-pie order
- Aria
- 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
- Ashram
- Asiatic
- Ask
- Assemble
- Assent
- Assessment year
- Assessor
- Asseverate
- Asshole
- Assign