- 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
- Autarky
- Authentic
- Authenticity
- Author
- Authoritarian
- Auxiliary
- Avant-garde
- Avaricious person
- Avascular
- Avengeful
- Aversion
- Aversion therapy
- Avian influenza
- 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
- A resaissance man