voluntary vs military

voluntary and military both are nouns.

Word	Noun	Adjective	Verb	Adverb
voluntary	Yes	Yes	No	No
military	Yes	Yes	No	No

voluntary (noun)	military (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)	military (adjective)
of your own free will or design; done by choice; not forced or compelled	associated with or performed by members of the armed services as contrasted with civilians
controlled by individual volition	characteristic of or associated with soldiers or the military
	of or relating to the study of the principles of warfare