- authentic
- authenticate
- authentication
- authenticity
- author
- authoritarian
- authoritative
- authority
- authorize
- Authorized Version
- authorship
- autistic
- auto
- autobiographical
- autobiography
- autocrat
- autocratic
- autocross
- Autocue®
- autofocus
- autograph
- Automat®
- automata
- automate
- automatic
- automatic pilot
- automatically
- automation
- automaton
- automobile
- automotive
- autonomous
- autonomy
- autopilot
- autopsy
- autumn
- autumnal
- auxiliary
- AV
- Av.
- avail
- availability
- available
- avalanche
- avant-garde
- avarice
- avaricious
- avdp.
- Ave.
- avenge
- avenue
- average
- averse
- aversion
- avert
- aviary
- aviation
- aviator
- avid
- avocado
- avoid
- avoidable
- avoidance
- avowed
- AVP
- AWACS
- await
- awake
- awakening
- award
- aware
- awareness
- awash
- away
- awe
- awesome
- awestruck
- awful
- awfully
- awhile
- awkward
- awkwardly
- awkwardness
- awl
- awning
- awoke
- awoken
- AWOL
- awry
- axe
- axes
- axiom
- axis
- axle
- ayatollah
- aye
- AYH
- AZ
- azalea
- Azerbaijan
- Azerbaijani
- Azeri
- Azores
- AZT
- Aztec
- azure