drumbeat vs war machine

drumbeat and war machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
drumbeat	Yes	No	No	No
war machine	Yes	No	No	No

drumbeat (noun)	war machine (noun)
a vehement and vociferous advocacy of a cause	the military forces of a nation
(military) the beating of a drum as a signal for lowering the flag at sundown
the sound made by beating a drum