air force academy vs academy

air force academy and academy both are nouns.

Word	Noun	Adjective	Verb	Adverb
air force academy	Yes	No	No	No
academy	Yes	No	No	No

As nouns, academy is a hypernym of air force academy; that is, academy is a word with a broader meaning than air force academy:

air force academy (noun)	academy (noun)
an academy for training air force officers	a learned establishment for the advancement of knowledge
	a secondary school (usually private)
	a school for special training
	an institution for the advancement of art or science or literature