Pontus vs geographic region

Pontus and geographic region both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pontus	Yes	No	No	No
geographic region	Yes	No	No	No

Pontus (noun)	geographic region (noun)
an ancient region of northern Asia Minor on the Black Sea; it reached its height under Mithridates VI but was later incorporated into the Roman Empire	a demarcated area of the Earth
(Greek mythology) ancient personification of the sea; father of Nereus