prophecy vs oracle

prophecy and oracle both are nouns.

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

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

prophecy: a prediction uttered under divine inspiration
oracle: a prophecy (usually obscure or allegorical) revealed by a priest or priestess; believed to be infallible

prophecy (noun)	oracle (noun)
knowledge of the future (usually said to be obtained from a divine source)	a shrine where an oracular god is consulted
a prediction uttered under divine inspiration	a prophecy (usually obscure or allegorical) revealed by a priest or priestess; believed to be infallible
	an authoritative person who divines the future