instrumental vs vocal

instrumental is not a noun while vocal is a noun.

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

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

instrumental (adjective)	vocal (adjective)
relating to or designed for or performed on musical instruments	having or using the power to produce speech or sound
serving or acting as a means or aid	relating to or designed for or using the singing voice
	given to expressing yourself freely or insistently
	full of the sound of voices