Caucasia vs Caucasian

Caucasia and Caucasian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Caucasia	Yes	No	No	No
Caucasian	Yes	Yes	No	No

Caucasia (noun)	Caucasian (noun)
a large region between the Black and Caspian seas that contains the Caucasus Mountains; oil is its major resource	a number of languages spoken in the Caucasus that are unrelated to languages spoken elsewhere
	a person of European descent with a light-skinned or pale complexion

Caucasia (adjective)	Caucasian (adjective)
	of or relating to the geographical region of Caucasia
	of or relating to Caucasian people