weekend warrior vs war machine

weekend warrior and war machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
weekend warrior	Yes	No	No	No
war machine	Yes	No	No	No

weekend warrior (noun)	war machine (noun)
a reservist who fulfills the military obligation on weekends	the military forces of a nation
a homeowner who acts as a contractor and tries to do major improvement projects on weekends (often without understanding the scope of the work to be done)