- also known as
- a.k.a.
- a long narrow meshwork bag (lused in olden times for carrying cash tied round the waist)
- acropolis
- assigning
- assignment channel
- appointive
- assignment operation
- appointment book
- amain
- amaethon
- abnormal toxicity
- applied psychology
- architectural engineering
- aeronautical engineering
- aestivate
- adrenergic
- adrenergic drug
- alcahest
- alkahest
- a nostril
- adecdotage
- astringe
- American Revolutionary leader
- alaska native
- across the country
- across the nation
- antiredeposition
- adiabatic process
- atomic physics
- american blight
- a nasal sound
- adenoid pad
- arneth index
- angara
- astronavigation
- artificial horizon
- admiralty mile
- air search radar
- a typical water plant
- a mischief monger
- air traveler
- aquaplane
- apprisal
- alfred noyes
- atomic power
- atomic explosion
- asbestos abatement
- antilog
- a millennium