- adaptableness
- amranthus polystachys
- anaesthesiologist
- a bird in hand is worth two in the bush
- afforest
- abseil
- addable
- a shot in the locker
- abominable snowman
- ah!
- aloe vera
- allopathy
- a dog's life
- ablepsy
- amerindian
- ameliorable
- absurd drama
- a bad patch
- acoustics
- alimentary canal
- abandoned woman
- age of shams
- ajinomoto
- acidulate
- ah
- air-cooling
- amphibian
- aeromancy
- an oil-press
- an
- abysm
- aegean sea
- ager
- a bird in the hand is worth two in the bush
- anal
- anarchical
- ampadi
- air-pump
- agamogenesis
- accusingly
- affranchise
- accusative
- activeness
- analog computer
- ambalavasis
- anal fissure
- alligator
- anaesthesia
- accountancy
- amputee
- abidance
- accused man
- adjective
- abrading
- actualist
- a fighting chance
- accessory gland
- acrobatic feat
- aestivation
- amicus curiae
- anecdote
- anemia
- anesthesia
- angular diameter
- aniconism
- animal
- animator
- animism
- animistic
- announcement
- announcing
- annual
- annus mirabilis
- anodise
- antebellum
- antecedence
- antecedent
- anthelmintic
- antihelmintic
- antilogy
- aphnology
- apiece
- aplasia
- apocryphal
- apollo
- apologia
- apologise
- appealing
- appeased
- appeasement
- apprentice
- apprise
- approach
- apse
- aqiqah
- aquaponics
- aquaris
- aquatic animal
- aqueduct
- arab