Caucasia vs geographic area

Caucasia and geographic area both are nouns.

Word	Noun	Adjective	Verb	Adverb
Caucasia	Yes	No	No	No
geographic area	Yes	No	No	No

Caucasia (noun)	geographic area (noun)
a large region between the Black and Caspian seas that contains the Caucasus Mountains; oil is its major resource	a demarcated area of the Earth