storyteller vs utterer

storyteller and utterer both are nouns.

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

As nouns, utterer is a hypernym of storyteller; that is, utterer is a word with a broader meaning than storyteller:

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

Other hypernyms of storyteller include speaker, talker, verbaliser, verbalizer.

storyteller (noun)	utterer (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)
someone who tells lies	someone who circulates forged banknotes or counterfeit coins
	an organism that can utter vocal sounds