singer vs vocaliser

singer and vocaliser both are nouns.

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

As nouns, singer and vocaliser are synonyms defined as:

Other synonyms of singer include vocalist, vocalizer.

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