- air photography
- air pipe
- air pipeline
- air piping
- air pocket
- air poisoning
- air pollution
- air post
- air power
- air processing
- air propeller
- air pulverizer
- air pump
- air pumping
- air puncher
- air purification
- air purifier
- air purity
- air radio
- air raise
- air rate
- air receipt
- air receiver
- air reconditioning
- air register
- air regulator
- air relay
- air renewal
- air requirement
- air requirements
- air reservoir
- air resistance
- air ring
- air riveter
- air roll
- air sac
- air sampling
- air saturation
- air saw
- air scoop
- air scout
- air screen
- air screw
- air scrubber
- air scuttle
- air seal
- air seasoned
- air seasoning
- air separation
- air separator
- air service
- air shed
- air shooting
- air show
- air shower
- air shrinkage
- air shuttle
- air sinus
- air slaking
- air soring
- air sound
- air source
- air space
- air speed
- air spillage
- air sprayer
- air spring
- air staff
- air stairs
- air standpipe
- air starter
- air stemming
- air sterilizer
- air strainer
- air stratification
- air strip
- air suction
- air supply
- air support
- air suspension
- air sweetening
- air switch
- air tamper
- air tank
- air tap
- air taxi
- air temperature
- air terminal
- air termination
- air test
- air thawing
- air thermometer
- air thermostat
- air throw
- air ticket
- air time
- air tool
- air traffic
- air tramping
- air transformer