augur vs seer

augur and seer both are nouns.

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

As nouns, seer is a hypernym of augur; that is, seer is a word with a broader meaning than augur:

augur: (ancient Rome) a religious official who interpreted omens to guide public policy
seer: an authoritative person who divines the future

Other hypernyms of augur include oracle, prophesier, prophet, vaticinator.

augur (noun)	seer (noun)
(ancient Rome) a religious official who interpreted omens to guide public policy	a person with unusual powers of foresight
	an authoritative person who divines the future
	an observer who perceives visually

augur (verb)	seer (verb)
indicate, as with a sign or an omen
predict from an omen