narrator vs teller

narrator and teller both are nouns.

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

As nouns, narrator and teller are synonyms defined as:

Other synonyms of narrator include storyteller.

narrator (noun)	teller (noun)
someone who tells a story	an employee of a bank who receives and pays out money
	an official appointed to count the votes (especially in legislative assembly)
	someone who tells a story