vocalizer vs instrumentalist

vocalizer and instrumentalist both are nouns.

Word	Noun	Adjective	Verb	Adverb
vocalizer	Yes	No	No	No
instrumentalist	Yes	No	No	No

As nouns, instrumentalist is a hypernym of vocalizer; that is, instrumentalist is a word with a broader meaning than vocalizer:

Other hypernyms of vocalizer include musician, player.

vocalizer (noun)	instrumentalist (noun)
a person who sings	someone who plays a music as a profession
an organism that can utter vocal sounds