military machine vs unarmored

military machine is a noun but unarmored is not a noun.

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

military machine (noun)	unarmored (noun)
the military forces of a nation

military machine (adjective)	unarmored (adjective)
	(used of persons or things military) without protective armor
	used of animals; without protective covering