narrator vs verbalizer

narrator and verbalizer both are nouns.

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

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

narrator: someone who tells a story
verbalizer: 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, verbaliser.

narrator (noun)	verbalizer (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)