vocal vs refrain

vocal and refrain both are nouns.

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

vocal (noun)	refrain (noun)
music intended to be performed by one or more singers, usually with instrumental accompaniment	the part of a song where a soloist is joined by a group of singers
a short musical composition with words

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

vocal (verb)	refrain (verb)
	choose not to consume
	resist doing something