B. B. King vs vocalizer

B. B. King and vocalizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
B. B. King	Yes	No	No	No
vocalizer	Yes	No	No	No

B. B. King (noun)	vocalizer (noun)
United States guitar player and singer of the blues (born in 1925)	a person who sings
	an organism that can utter vocal sounds