- Atmospheric air
- Atomic power
- Atomizer
- Atrium
- Atrocity
- Attache
- Attainability
- Attainable
- Attainment of manhood
- Attempt
- Attentiveness
- Attenuation
- Attested
- Atticism
- Attorney
- Attractive
- Attribution
- Auberge
- Audacious
- Audible
- Audiology
- Audiometer
- Audiovisual
- Auditory
- Augean
- August
- Augustan
- Auld
- Auld lang syne
- Aural
- Aureole
- Auricular
- Aurora australis
- Auspice
- Auspicious
- Auspicious time
- Austerity
- Authenticated
- Author of atharva veda
- Authoratative treatise
- Authoress
- Authorship
- Auto
- Auto score
- Auto-suggestion
- Autocracy
- Autogenously
- Autolysis
- Automatic
- Automatic check
- Accmplished
- Airbrush
- Alyssum
- Amarasimhan
- Antiquarian
- Ascribable
- Aurist
- A bed of nails
- A bird
- Admass
- A bitter pill to swallow
- A brahmin who receives presents in honour of the dead
- A bunch of
- A cavity formed by folding togetherthe open palms
- A chip off the old block
- A collyrium
- A devil kept under control by siva
- A doll-play
- A dream come true
- A fit of temper
- A game of cards
- A gentle as a lamb
- A golden age
- A good many
- A good while
- A hand-blow
- A hard nut to crack
- A heavy heart
- A hell on earth
- A helping hand
- A hill tribe
- A hit below the belt
- A homely game
- A jain priest
- A lamb to the slaughter
- A lame duck
- A level
- A little
- Admin
- A lunar day
- A man easily provoked
- A man of letters
- A musical drm
- A peak of the western ghats
- A perfume
- A posteriori
- A power in the land
- A pyramid scheme
- A queen mother
- A race against time