grade insignia vs military

grade insignia and military both are nouns.

Word	Noun	Adjective	Verb	Adverb
grade insignia	Yes	No	No	No
military	Yes	Yes	No	No

grade insignia (noun)	military (noun)
V-shaped sleeve badge indicating military rank and service	the military forces of a nation

grade insignia (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