Nubia vs geographic region

Nubia and geographic region both are nouns.

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

Nubia (noun)	geographic region (noun)
an ancient region of northeastern Africa (southern Egypt and northern Sudan) on the Nile; much of Nubia is now under Lake Nasser	a demarcated area of the Earth