- acre
- acrylic
- activator
- add time
- a blood relative
- active voice
- adhered
- alack
- a fight to the finish
- airing cupboard
- americana
- address size
- alopecia
- ampoule
- allotropism
- a good second
- a good thing
- algebric
- adulterant
- ambulatory
- an opening flower
- above the weather
- alphabetical
- a page in history
- agnomen
- adhatoda vasica
- airshaft
- adnation
- after-taste
- almirah
- agnus castus
- abridgment
- aleatory
- an acquatic plant
- abe
- a la
- abba
- adenoids
- a nervous wreck
- ammonite stone
- andaman island
- androcentricity
- androgen
- andropause
- andropogon
- anecdotal
- anemic
- anemone
- anencephalus
- anesthetic
- at the same time
- adulterress
- animal kingdom
- animalcule
- acquaintanceship
- animated
- amberite
- allergen
- anise
- anise seed herb
- ankle
- airlock
- aerial vehicle
- algol
- annihilated
- airtime
- aforestation
- annotation
- agonising
- announcer
- annoy
- amphetamine
- annunciate
- anodyne
- anoint
- anointing sick
- anole
- anomalous
- ant-lion
- antagonist
- antagonistic
- ablative case
- antemeridian
- abortive
- anthem
- anti-incumbent
- anti-revolutionary
- an assylum
- antianxiety
- antibiotic
- analystic mind
- anticipatory bail
- anticlimax
- antics
- antisocial
- antithesis
- a bull in a china shop
- antonym
- anxiety disorders
- amoeba