- Arecanut palm
- Arete
- Argot
- Argument
- Argumentative
- Argy-bargy
- 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
- Assignment
- Assist
- Assistant
- Assistant manager
- Assistant teacher
- Assort
- Assuage
- Assumed
- Assumed name
- Assuming
- Assumption
- Assylum
- Astadyayi
- Asthma
- Astir
- Astral projection
- At all points
- At an alarming rate
- At what time?
- At any place
- At any rate
- At first hand
- At home
- At last
- Attend
- At this time of day
- At times
- At your service
- Atelier
- Atharvaveda
- Athena
- Atherosclerosis
- Athiest
- Athirst
- Athlete
- Athletic exercise
- Athletics
- Athma
- Atmolysis
- Atmospheric pressure
- Attendance
- Attendance register
- Attends
- Attention
- Attention deficit disorder
- Attentively
- Attenuate
- Attest