headquarters vs military machine

headquarters and military machine both are nouns.

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

headquarters (noun)	military machine (noun)
the military installation from which a commander performs the functions of command	the military forces of a nation
(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