vocalist vs vocaliser

vocalist and vocaliser both are nouns.

Word	Noun	Adjective	Verb	Adverb
vocalist	Yes	No	No	No
vocaliser	Yes	No	No	No

As nouns, vocalist and vocaliser are synonyms defined as:

Other synonyms of vocalist include singer, vocalizer.

vocalist (noun)	vocaliser (noun)
a person who sings	a person who sings
	an organism that can utter vocal sounds