vocal vs outspoken

vocal is a noun but outspoken is not a noun.

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

As adjectives, vocal and outspoken are synonyms defined as:

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

vocal (adjective)	outspoken (adjective)
having or using the power to produce speech or sound	given to expressing yourself freely or insistently
relating to or designed for or using the singing voice	characterized by directness in manner or speech; without subtlety or evasion
given to expressing yourself freely or insistently
full of the sound of voices