vaticinator vs seer

vaticinator and seer both are nouns.

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

As nouns, vaticinator and seer are synonyms defined as:

Other synonyms of vaticinator include oracle, prophesier, prophet.

vaticinator (noun)	seer (noun)
an authoritative person who divines the future	a person with unusual powers of foresight
	an authoritative person who divines the future
	an observer who perceives visually