oracle vs seer

oracle and seer both are nouns.

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

As nouns, oracle and seer are synonyms defined as:

Other synonyms of oracle include prophesier, prophet, vaticinator.

oracle (noun)	seer (noun)
a shrine where an oracular god is consulted	a person with unusual powers of foresight
a prophecy (usually obscure or allegorical) revealed by a priest or priestess; believed to be infallible	an authoritative person who divines the future
an authoritative person who divines the future	an observer who perceives visually