armoured combat vehicle vs military machine

armoured combat vehicle and military machine both are nouns.

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

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