- Aspects
- Aspersion
- Assafoetida
- Assail
- Assam
- Assassinate
- Assault
- Assay
- Assured
- Asthenia
- Astis
- Astonished
- Astraddle
- Astral body
- Astray
- Astrodome
- Astrolobe
- Astrologer
- Astute
- Astuteness
- Aswathi star
- Aswini devas
- At a gun point
- At will
- Atelophobia
- Atheism
- Atheistic
- Athri
- Athwart
- Atlantic
- Atmosphere
- Atom
- Atomic
- Atomic number
- Attendant
- Attending
- Attentive
- Attestation
- Attractiveness
- Atwitter
- Au courant
- Aunt
- Aureate
- Aurora
- Auster
- Austere
- Auteur
- Authenticate
- Authentication
- Authorised
- Authoritarianism
- Authoritative
- Authorized person
- Autistic
- Auto index
- Auto-ignition
- Autobiography
- Autodidact
- Automation
- Autonomy
- Avionics
- Awake
- Awe
- Awe-inspiring
- Awestruck
- Awhile
- Awkwardly
- Awn
- Altaltissimo
- Ark
- Astron
- Ataxia, ataxia
- a bag of bones
- A bed roses
- A bird in a golden cage
- A bit
- A black sheep
- A black-leg
- A blank look
- A bull in a china shop
- A bun in the oven
- A capella
- A chorus of thanks
- A cold sweat
- A cubit
- A good number of
- A good or great while
- A good second
- A good sort
- A hard life
- A herb
- A herb conceived as being capable of bringing the dead to life
- A large number
- A late hour
- A long face
- A long gasp
- A long time
- A magnetic personality
- A man of substance
- A man of the people