military vs grade insignia

military and grade insignia both are nouns.

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

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

military (adjective)	grade insignia (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