military machine vs muster

military machine and muster both are nouns.

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

military machine (noun)	muster (noun)
the military forces of a nation	compulsory military service
	a gathering of military personnel for duty

military machine (verb)	muster (verb)
	call to duty, military service, jury duty, etc.
	gather or bring together