rank and file vs military

rank and file and military both are nouns.

Word	Noun	Adjective	Verb	Adverb
rank and file	Yes	No	No	No
military	Yes	Yes	No	No

rank and file (noun)	military (noun)
the ordinary members of an organization (such as the enlisted soldiers of an army)	the military forces of a nation
people who constitute the main body of any group

rank and file (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