- Armpit
- Army comprising elephants
- Aroint
- Around
- Arranged
- Arranging
- Arrant
- Array of clouds
- Arrears
- Arresting
- Arrival
- Arriving
- Articulate
- Artificer
- Artificial insemination
- Artificiality
- Artistically
- Artistry
- Arts and crafts
- As
- As a first step
- As a man
- 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
- Assemble
- Assent
- Assessment year
- Assessor
- Asseverate
- Asshole
- Assign
- Assignment
- Assist
- Assistant
- Assistant manager
- Assistant teacher
- Astringent
- Astrological scholar
- Astronomy
- Asura
- Aswathi
- Asymptomatic
- Asynchronous transfer mode
- At
- At a blow
- At a glance
- At a loss
- 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
- Attic
- Attire abode
- Attirement
- Attitude
- Attracted
- Attracting
- Attributable
- Attribute
- Attributes
- Attrition
- Atypical
- Auntie
- Aura
- Aurora borealis
- Auscultation
- Auspicious function
- Auspicious sound
- Auspicious woman
- Austral