communicative vs vocal

communicative is not a noun while vocal is a noun.

Word	Noun	Adjective	Verb	Adverb
communicative	No	Yes	No	No
vocal	Yes	Yes	No	No

communicative (noun)	vocal (noun)
	music intended to be performed by one or more singers, usually with instrumental accompaniment
	a short musical composition with words

communicative (adjective)	vocal (adjective)
able or tending to communicate	having or using the power to produce speech or sound
of or relating to communication	relating to or designed for or using the singing voice
	given to expressing yourself freely or insistently
	full of the sound of voices