- Army comprising elephants
- Aroint
- Around
- Arranged
- Arranging
- Arrant
- Array of clouds
- Arrears
- Arresting
- Arrival
- Arriving
- Arrows
- Arse over tit
- Arsenic
- Arsis
- Arson
- Art
- Art of creating new meaning by deleting one word
- Art work
- Artesian well
- Articles
- Articulate
- Artificer
- Artificial insemination
- Artificiality
- Artistically
- Artistry
- Arts and crafts
- As
- As a first step
- As a man
- As far as in me lies
- As follows
- As gay as a lark
- As it were
- As much
- As much as
- As never before
- As proud as a peacock
- As regards
- As right as rain
- As safe as houses
- As soon as
- As soon as possible
- As the case may be
- As the crow flies
- As thin as a lath
- As usual
- Asafetida
- Asap
- Ascendancy
- Ascension
- Ascertained
- Ascetics
- Asclepias acida
- Ascribe
- Asexual
- Ashamedly
- Ashen
- Ashes
- Ashram
- Asiatic
- Ask
- Asphalt
- Asphyxia
- Asphyxiator
- Aspirate
- Aspiration
- Aspire
- Asr
- Ass
- Assailant
- Assassin
- 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
- Astringent
- Astrological scholar
- Astronomy
- Asura