utterer vs vocaliser

utterer and vocaliser both are nouns.

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

As nouns, utterer and vocaliser are synonyms defined as:

Other synonyms of utterer include vocalizer.

utterer (noun)	vocaliser (noun)
someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)	a person who sings
someone who circulates forged banknotes or counterfeit coins	an organism that can utter vocal sounds
an organism that can utter vocal sounds