- air pocket
- air pollution
- air pressure
- air pressure gauge
- air pump
- air raid
- air rifle
- air show
- air steward
- air stewardess
- air tanker
- air taxi
- air terminal
- air traffic control
- air traffic controller
- air travel
- air valve
- air vice-marshal
- airbag
- airbase
- airbed
- airborne
- airbrake
- airbrush
- Airbus
- air-conditioned
- air-conditioner
- air-conditioning
- air-cooled
- aircraft
- aircraft carrier
- aircraftsman
- aircraftswoman
- aircrew
- airdrome
- airdrop
- air-dry
- Airedale terrier
- airer
- airfare
- airfield
- airflow
- airfoil
- airframe
- airfreight
- airgun
- airhead
- airhole
- airily
- airiness
- airing
- airing cupboard
- air-kiss
- airlane
- airless
- airlift
- airline
- airliner
- airlock
- airmail
- airman
- airmobile
- airplane
- airplay
- airport
- air-raid shelter
- air-raid warden
- air-raid warning
- airscrew
- air-sea rescue
- airship
- airsick
- airsickness
- airsock
- airspace
- airspeed
- airstream
- airstrike
- airstrip
- airtight
- airtime
- air-to-air
- air-to-surface
- air-traffic control
- air-traffic controller
- airvent
- airwaves
- airway
- airwoman
- airworthiness
- airworthy
- airy
- airy-fairy
- aisle
- aitch
- aitchbone
- ajar
- AK
- aka
- akimbo
- akin
- AL
- al dente
- Alabama
- alabaster
- alack
- alacrity
- Aladdin
- alalia
- Alamo
- alanine
- alarm
- alarm clock
- alarmed
- alarming
- alarmingly
- alarmist
- alas
- Alaska
- Alaska Range
- Alaskan
- alb
- albacore
- Albania
- Albanian
- albatross
- albedo
- albeit
- Albert Hall
- Alberta
- albinism
- albino
- Albion
- album
- albumen
- albumin
- albuminous
- alchemist
- alchemy
- Alcibiades
- alcohol
- alcohol-free
- alcoholic
- Alcoholics Anonymous
- alcoholism
- alcopop
- alcove
- aldehyde
- alder
- alderman
- ale
- aleatoric
- aleatory
- alehouse
- alert
- alert box
- alertness
- A-level
- alewife
- Alexander
- Alexandra Palace
- Alexandria
- alexandrine
- alexia
- alfalfa
- Alfred
- alfresco
- algae
- algal
- algebra
- algebraic
- Algeria
- Algerian
- Algiers
- algorithm
- algorithmic
- alias
- aliasing
- alibi
- Alice
- Alice band
- alien
- alienate
- alienated
- alienation
- alienist
- alight
- align
- alignment
- alike
- alimentary
- alimentary canal
- alimentation
- alimony
- A-line
- aliquot
- alive
- alkali
- alkaline
- alkalinity