- ashen
- ashore
- ashy
- asokatree
- asphyxia
- asphyxiate
- asphyxiator
- aspiration
- aspire
- assessment year
- asset
- assignee
- assimilate
- associated
- association
- astral body
- astraphobia
- astro
- astrobotany
- astrodome
- astrologer
- astron
- at all costs
- at issue
- at large
- at peak
- at random
- at school
- at sea
- at someone's disposal
- at someone's disposition
- at stake
- athiest
- athlete
- athletic exercise
- athletics
- atomic
- attachment
- attack
- attagirl
- attained puberty
- attainment
- attempt
- attendance register
- attractive
- attributable
- attribute
- atwitter
- au courant
- augur
- auld lang syne
- auricular
- auspicious function
- autodidact
- auspicious woman
- austere
- authentically
- authoress
- authorial
- autogenously
- autolysis
- automatic check
- autonomous
- auxiliary
- auxiliary bishop
- avail
- availability
- avascular
- avenge
- aver
- average
- avian
- avid
- aviform
- avoidable
- avow
- awake to
- awry
- ax
- axe
- axe helve
- axiomatic
- axis major
- axis neutral
- abbreviated
- abbreviation
- abdication
- abet
- abeyance
- ablaze
- abrade
- abrasive
- abrogate
- abrupt
- absolute
- abusive
- acceleration
- accessible
- accident
- accolade