voluntary vs armed forces

voluntary and armed forces both are nouns.

Word	Noun	Adjective	Verb	Adverb
voluntary	Yes	Yes	No	No
armed forces	Yes	No	No	No

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