Air-to-air and Aircraft

Air-to-air adjective - Operating between or launched from or involving rockets or aircraft in flight.

Aircraft and air-to-air are semantically related. In some cases you can use "Aircraft" instead an adjective phrase "Air-to-air".

Aircraft noun - A vehicle that can fly.

Air-to-air and aircraft are semantically related. Sometimes you can replace phrase "Air-to-air" with "Aircraft", this terms are similar.