war machine vs collateral damage

war machine and collateral damage both are nouns.

Word	Noun	Adjective	Verb	Adverb
war machine	Yes	No	No	No
collateral damage	Yes	No	No	No

war machine (noun)	collateral damage (noun)
the military forces of a nation	(euphemism) inadvertent casualties and destruction inflicted on civilians in the course of military operations