seer vs auspex

seer and auspex both are nouns.

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

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

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

Other hyponyms of seer include augur, prophetess, sibyl.

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