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air force officerAir Force Research Laboratory
Air Force Space Command
Air fountain
Air furnace
Air gap
Air gas
air group
air gun
Air hammer
Air hole
air horn
air hose
air hostess
Air jacket
air lane
-- air letter --
Air level
Air line
air lock
air mail
air marshal
air mass
AIr MAterial COmmand compiler
air mattress
Air Medal
air mile
Air National Guard
air out
air passage
Air pipe
Air plant
Air pocket
air letter
| Noun | 1. |  air letter - a letter sent by air mail |