Caucasian vs doer

Caucasian and doer both are nouns.

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

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

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

Other hypernyms of Caucasian include actor, worker.

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

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