vocalizer vs singer

vocalizer and singer both are nouns.

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

As nouns, vocalizer and singer are synonyms defined as:

Other synonyms of vocalizer include vocaliser, vocalist.

vocalizer (noun)	singer (noun)
a person who sings	a person who sings
an organism that can utter vocal sounds