white woman vs White person

white woman and White person both are nouns.

Word	Noun	Adjective	Verb	Adverb
white woman	Yes	No	No	No
White person	Yes	No	No	No

As nouns, White person is a hypernym of white woman; that is, White person is a word with a broader meaning than white woman:

white woman: a woman who is White
White person: a person of European descent with a light-skinned or pale complexion

Other hypernyms of white woman include Caucasian, White, adult female, woman.

white woman (noun)	White person (noun)
a woman who is White	a person of European descent with a light-skinned or pale complexion