narrator vs verbaliser

narrator and verbaliser both are nouns.

Word	Noun	Adjective	Verb	Adverb
narrator	Yes	No	No	No
verbaliser	Yes	No	No	No

As nouns, verbaliser is a hypernym of narrator; that is, verbaliser is a word with a broader meaning than narrator:

narrator: someone who tells a story
verbaliser: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

Other hypernyms of narrator include speaker, talker, utterer, verbalizer.

narrator (noun)	verbaliser (noun)
someone who tells a story	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)