war machine vs pullback

war machine and pullback both are nouns.

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

war machine (noun)	pullback (noun)
the military forces of a nation	(military) the act of pulling back (especially an orderly withdrawal of troops)
	a device (as a decorative loop of cord or fabric) for holding or drawing something back