oracle vs prophetess

oracle and prophetess both are nouns.

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

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

Other hyponyms of oracle include augur, auspex, sibyl.

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