voluntary vs war machine

voluntary and war machine both are nouns.

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

voluntary (noun)	war machine (noun)
composition (often improvised) for a solo instrument (especially solo organ) and not a regular part of a religious service or musical performance	the military forces of a nation
(military) a person who freely enlists for service

voluntary (adjective)	war machine (adjective)
of your own free will or design; done by choice; not forced or compelled
controlled by individual volition