war machine vs fighter

war machine and fighter both are nouns.

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

war machine (noun)	fighter (noun)
the military forces of a nation	a high-speed military or naval airplane designed to destroy enemy aircraft in the air
	someone who fights (or is fighting)
	someone who fights for a cause