military machine vs smoke screen

military machine and smoke screen both are nouns.

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

military 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