Caucasian vs White people

Caucasian and White people both are nouns.

Word	Noun	Adjective	Verb	Adverb
Caucasian	Yes	Yes	No	No
White people	Yes	No	No	No

Caucasian (noun)	White people (noun)
a number of languages spoken in the Caucasus that are unrelated to languages spoken elsewhere	a light-skinned race
a person of European descent with a light-skinned or pale complexion

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