military headquarters vs headquarters

military headquarters and headquarters both are nouns.

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

As nouns, military headquarters and headquarters are synonyms defined as:

military headquarters and headquarters: the military installation from which a commander performs the functions of command

Other synonyms of military headquarters include HQ.

military headquarters (noun)	headquarters (noun)
the military installation from which a commander performs the functions of command	the military installation from which a commander performs the functions of command
	(usually plural) the office that serves as the administrative center of an enterprise
	(plural) a military unit consisting of a commander and the headquarters staff