war machine vs olive-drab uniform

war machine and olive-drab uniform both are nouns.

Word	Noun	Adjective	Verb	Adverb
war machine	Yes	No	No	No
olive-drab uniform	Yes	No	No	No

war machine (noun)	olive-drab uniform (noun)
the military forces of a nation	military uniform of the United States Army; made from cloth of a dull olive color