military rank vs military

military rank and military both are nouns.

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

military rank (noun)	military (noun)
rank in a military organization	the military forces of a nation

military rank (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