insignia of rank vs military

insignia of rank and military both are nouns.

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

insignia of rank (noun)	military (noun)
an insignia worn on a military uniform	the military forces of a nation

insignia of 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