chief of staff vs military

chief of staff and military both are nouns.

Word	Noun	Adjective	Verb	Adverb
chief of staff	Yes	No	No	No
military	Yes	Yes	No	No

chief of staff (noun)	military (noun)
the senior officer of a service of the armed forces	the military forces of a nation

chief of staff (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