- aint
- acquired immunodeficiency syndrome
- amphitheater
- and how
- ascendancy
- a good many
- ascendant
- and that's flat
- ascension
- and things
- and what is more
- andragogy
- ascribable
- a lack-all
- ascribe
- anesthetist
- aneurysms
- anew
- angiosperms
- a bird in hand is worth two in the bush
- anglicize
- anglo
- anglophobe
- ash melon
- ash wednesday
- angular
- anile
- animadversion
- animadvert
- ashamed
- animate
- ashen
- a fractuary
- assert oneself
- ankle joint
- airavata
- annals
- ashore
- anno domini
- announce
- annoyance
- alga
- afforest
- annular eclipse
- ask for the moon
- at first glance
- anode
- anopheles
- alcoholic
- another cup of tea
- answer back to
- aglets
- answer someone back
- answer the door
- asokatree
- antagonism
- antagonize
- abend
- abseil
- ante-room
- anteater
- antedate
- antediluvian
- antelope
- antenatal
- asphyxiator
- anther
- anther lobe
- anthers
- anthocyanins
- assassinate
- anthropic
- anthropogenic
- assassination
- anthropologist
- anthropology
- acm
- anti-grammatical
- assembling
- anti-money laundering
- anticipate
- algal
- anticoagulant
- antidemocrat
- antidote
- antifoundationalism
- antigen
- antihistamines
- antilog
- antimycotic
- antinomy
- analyse, analyze
- accompany
- aquiline
- antipole
- antiquary
- antiquated
- antiquity
- antithetical
- aficionado