Letters that make air-to-air
a, o, r, t, i are letters that make 'air-to-air'
a, o, r, t, i are letters that make 'air-to-air'
1 possible definitions for 'air-to-air'
Under this definition, air-to-air is an adjective and has the following properties:
air-to-surface, air-to-ground, surface-to-air have the opposite meaning of 'air-to-air'
"air-to-air missiles", "air-to-air communications"