Black woman vs Black person

Black woman and Black person both are nouns.

Word	Noun	Adjective	Verb	Adverb
Black woman	Yes	No	No	No
Black person	Yes	No	No	No

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

Black woman: a woman who is Black
Black person: a person with dark skin who comes from Africa (or whose ancestors came from Africa)

Other hypernyms of Black woman include African-American, Black, Negro, Negroid, adult female, woman, blackamoor.

Black woman (noun)	Black person (noun)
a woman who is Black	a person with dark skin who comes from Africa (or whose ancestors came from Africa)