war machine vs Army National Guard

war machine and Army National Guard both are nouns.

Word	Noun	Adjective	Verb	Adverb
war machine	Yes	No	No	No
Army National Guard	Yes	No	No	No

war machine (noun)	Army National Guard (noun)
the military forces of a nation	a civilian reserve component of the United States Army comprised of guardsmen who serve during overseas peacekeeping missions and during local emergencies