fighter aircraft vs military

fighter aircraft and military both are nouns.

Word	Noun	Adjective	Verb	Adverb
fighter aircraft	Yes	No	No	No
military	Yes	Yes	No	No

fighter aircraft (noun)	military (noun)
a high-speed military or naval airplane designed to destroy enemy aircraft in the air	the military forces of a nation

fighter aircraft (adjective)	military (adjective)
	associated with or performed by members of the armed services as contrasted with civilians
	characteristic of or associated with soldiers or the military
	of or relating to the study of the principles of warfare