sibyl vs oracle

sibyl and oracle both are nouns.

Word	Noun	Adjective	Verb	Adverb
sibyl	Yes	No	No	No
oracle	Yes	No	No	No

As nouns, oracle is a hypernym of sibyl; that is, oracle is a word with a broader meaning than sibyl:

Other hypernyms of sibyl include prophesier, prophet, seer, vaticinator.

sibyl (noun)	oracle (noun)
(ancient Rome) a woman who was regarded as an oracle or prophet	a shrine where an oracular god is consulted
a woman who tells fortunes	a prophecy (usually obscure or allegorical) revealed by a priest or priestess; believed to be infallible
	an authoritative person who divines the future