- ants in one's pants
- anus
- assimilate
- anxiety
- ablution
- arrestable
- afro
- aorta
- apart
- ape
- apex
- aphonia
- aphorism
- associated
- apiary
- apiology
- apnoea
- agglutinate
- apolitical
- assumed
- affluenza
- apostate
- apostatize
- apothecary
- apparel
- assurance
- appear
- assure
- appendix
- appertain appertain
- appetising
- applaud
- apple
- apple of the eye
- astral body
- applicant
- application
- application form
- application software
- application window
- applies
- astrobotany
- astrodome
- appointed time
- astrologer
- appose
- appraisable
- appraise
- appraised
- astron
- adiabatic
- abstain
- appreciator
- asymptote
- apprehend
- apprehension
- acrobatics
- apprenticeship
- apprize
- address bus
- aries
- accessible
- approbate
- alstonia scholaris
- appropriate
- airy-fairy
- aimlessness
- allege
- allocation
- approximate
- approximately
- approximation
- astis
- appurtenances
- apriorism
- apron
- aptitude test
- aquifer
- aquiline
- arabia
- arabian sea
- arable
- a hen party
- arbiter
- an even chance
- allayment
- at every turn recurrently
- act
- arbour
- arcane
- arch-work
- archaeology
- archaic
- authorized person
- archbishop
- archbishopric
- archdeacon
- archer
- archetypal
- aircraftwoman