Caucasic vs Caucasian

Caucasic is not a noun while Caucasian is a noun.

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

As adjectives, Caucasic and Caucasian are synonyms defined as:

Caucasic and Caucasian: of or relating to the geographical region of Caucasia

Caucasic (noun)	Caucasian (noun)
	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

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