military machine vs unarmoured

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

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

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

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