Caucasian vs actor

Caucasian and actor both are nouns.

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

As nouns, actor is a hypernym of Caucasian; that is, actor is a word with a broader meaning than Caucasian:

Caucasian: a person of European descent with a light-skinned or pale complexion
actor: a person who acts and gets things done

Other hypernyms of Caucasian include doer, worker.

Caucasian (noun)	actor (noun)
a number of languages spoken in the Caucasus that are unrelated to languages spoken elsewhere	a theatrical performer
a person of European descent with a light-skinned or pale complexion	a person who acts and gets things done

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