- AI
- AIAI
- aid
- aid station
- aide
- aide-de-camp
- aide-memoire
- aided
- Aides
- Aidoneus
- AIDS
- Aigina
- aiglet
- aigret
- aigrette
- aiguilette
- Aiken
- aikido
- ail
- ailanthus
- Ailanthus altissima
- ailanthus silkworm
- aileron
- Ailey
- ailing
- ailment
- ailurophobia
- Ailuropoda
- Ailuropoda melanoleuca
- Ailuropodidae
- Ailurus
- Ailurus fulgens
- aim
- Aimee Semple McPherson
- aimless
- aimlessly
- aimlessness
- ain
- aioli
- aioli sauce
- air
- air alert
- air attache
- air attack
- air bag
- air base
- air bladder
- air bubble
- air castle
- air cell
- air cleaner
- Air Combat Command
- air compressor
- air conditioner
- air conditioning
- Air Corps
- air cover
- air crew
- air current
- air cushion
- air defense
- air division
- air duct
- air embolism
- air filter
- air flow
- air force
- air force academy
- Air Force Intelligence Surveillance and Reconnaissance
- Air Force ISR
- air force officer
- Air Force Research Laboratory
- Air Force Space Command
- air gas
- air group
- air gun
- air hammer
- air hole
- air horn
- air hose
- air hostess
- air jacket
- air lane
- air letter
- air lock
- air mail
- air marshal
- air mass
- air mattress
- Air Medal
- air mile
- Air National Guard
- air out
- air passage
- air plant
- air pocket
- air pollution
- air potato
- air power
- air pressure
- air pump
- air raid
- air reconnaissance
- air rifle
- air sac
- air search radar
- air shaft
- air sick
- air sickness
- air sock
- air space
- air spring
- air station
- air terminal
- air thermometer
- air traffic
- air transport
- air transportation
- air transportation system
- air travel
- air traveler
- air traveller
- air unit
- air wave
- air well
- air-breathing
- air-condition
- air-conditioned
- air-cool
- air-cooled
- air-dried
- air-drop
- air-dry
- air-filled
- air-freight
- air-intake
- air-raid shelter
- air-ship
- air-slake
- air-sleeve
- air-tight
- air-to-air
- air-to-air missile
- air-to-ground
- air-to-ground missile
- air-to-surface
- air-to-surface missile
- airborne
- airborne patrol
- airborne transmission
- airbrake
- airbrush
- airburst
- airbus
- aircraft
- aircraft carrier
- aircraft engine
- aircraft landing
- aircraftman
- aircraftsman
- aircrew
- aircrewman
- airdock
- airdrome
- airdrop
- Aire
- Aire River
- aired
- Airedale
- Airedale terrier
- airfare
- airfield
- airflow
- airfoil
- airforce
- airframe
- airfreight
- airgun
- airhead
- airheaded
- airily
- airiness
- airing
- airing cupboard
- airless
- airlift
- airlike
- airline
- airline business
- airliner
- airlock
- airmail
- airmail letter
- airmailer
- airman
- airmanship
- airplane
- airplane landing
- airplane maneuver
- airplane mechanics
- airplane pilot
- airplane propeller
- airplane ticket
- airport
- airport terminal
- airpost
- airs
- airscrew
- airship
- airsick
- airsickness
- airspace
- airspeed
- airstream
- airstrip
- airt
- airtight
- airwave
- airway
- airwoman
- airworthiness
- airworthy
- airy
- aisle
- aitchbone
- Aix
- Aix galericulata
- Aix sponsa
- Aix-la-Chapelle
- Aizoaceae