air-to-ground
air-to-water
air-trap
air-tube
air-turbine
airturboramjet
air-type
air-vapor
air-vent
air-ventilation
  air-wall
air-water
airway
airworthiness
airworthy
Airy-Stokes
aisle
aisle-to-aisle
Aitken
Ajax
ajowan