vocaliser vs singer

vocaliser and singer both are nouns.

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

As nouns, vocaliser and singer are synonyms defined as:

Other synonyms of vocaliser include vocalist, vocalizer.

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