attack aircraft vs aeroplane

attack aircraft and aeroplane both are nouns.

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

As nouns, aeroplane is a hypernym of attack aircraft; that is, aeroplane 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
aeroplane: an aircraft that has a fixed wing and is powered by propellers or jets

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

attack aircraft (noun)	aeroplane (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