teller vs griot

teller and griot both are nouns.

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

As nouns, griot is a hyponym of teller; that is, griot is a word with a more specific, narrower meaning than teller:

teller: someone who tells a story
griot: a storyteller in West Africa; perpetuates the oral traditions of a family or village

Other hyponyms of teller include anecdotist, raconteur, fabulist.

teller (noun)	griot (noun)
an employee of a bank who receives and pays out money	a storyteller in West Africa; perpetuates the oral traditions of a family or village
an official appointed to count the votes (especially in legislative assembly)
someone who tells a story