air cover vs military

air cover and military both are nouns.

Word	Noun	Adjective	Verb	Adverb
air cover	Yes	No	No	No
military	Yes	Yes	No	No

air cover (noun)	military (noun)
the use of military aircraft to provide protection against attack by enemy aircraft during ground or naval operations	the military forces of a nation

air cover (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