military machine vs engagement

military machine and engagement both are nouns.

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

military machine (noun)	engagement (noun)
the military forces of a nation	the act of sharing in the activities of a group
	a hostile meeting of opposing military forces in the course of a war
	the act of giving someone a job
	employment for performers or performing groups that lasts for a limited period of time
	a mutual promise to marry
	contact by fitting together
	a meeting arranged in advance