armoured combat vehicle vs war machine

armoured combat vehicle and war machine both are nouns.

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

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