war machine vs smoke screen

war machine and smoke screen both are nouns.

Word	Noun	Adjective	Verb	Adverb
war machine	Yes	No	No	No
smoke screen	Yes	No	No	No

war machine (noun)	smoke screen (noun)
the military forces of a nation	an action intended to conceal or confuse or obscure
	(military) screen consisting of a cloud of smoke that obscures movements