war machine vs weapon of mass destruction

war machine and weapon of mass destruction both are nouns.

Word	Noun	Adjective	Verb	Adverb
war machine	Yes	No	No	No
weapon of mass destruction	Yes	No	No	No

war machine (noun)	weapon of mass destruction (noun)
the military forces of a nation	a weapon that kills or injures civilian as well as military personnel (nuclear and chemical and biological weapons)