military machine vs armoured combat vehicle

military machine and armoured combat vehicle both are nouns.

Word	Noun	Adjective	Verb	Adverb
military machine	Yes	No	No	No
armoured combat vehicle	Yes	No	No	No

military machine (noun)	armoured combat vehicle (noun)
the military forces of a nation	an enclosed armored military vehicle; has a cannon and moves on caterpillar treads