prophetess vs oracle

prophetess and oracle both are nouns.

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

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

Other hypernyms of prophetess include prophesier, prophet, seer, vaticinator, adult female, woman.

prophetess (noun)	oracle (noun)
a woman prophet	a shrine where an oracular god is consulted
	a prophecy (usually obscure or allegorical) revealed by a priest or priestess; believed to be infallible
	an authoritative person who divines the future