attack aircraft vs airplane

attack aircraft and airplane both are nouns.

Word	Noun	Adjective	Verb	Adverb
attack aircraft	Yes	No	No	No
airplane	Yes	No	No	No

As nouns, airplane is a hypernym of attack aircraft; that is, airplane is a word with a broader meaning than attack aircraft:

attack aircraft: a high-speed military or naval airplane designed to destroy enemy aircraft in the air
airplane: an aircraft that has a fixed wing and is powered by propellers or jets

Other hypernyms of attack aircraft include aeroplane, plane, military plane, warplane.

attack aircraft (noun)	airplane (noun)
a high-speed military or naval airplane designed to destroy enemy aircraft in the air	an aircraft that has a fixed wing and is powered by propellers or jets