oracle vs augur

oracle and augur both are nouns.

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

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

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

Other hyponyms of oracle include auspex, prophetess, sibyl.

oracle (noun)	augur (noun)
a shrine where an oracular god is consulted	(ancient Rome) a religious official who interpreted omens to guide public policy
a prophecy (usually obscure or allegorical) revealed by a priest or priestess; believed to be infallible
an authoritative person who divines the future

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