nigra vs Black person

nigra and Black person both are nouns.

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

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

nigra: (ethnic slur) extremely offensive name for a Black person
Black person: a person with dark skin who comes from Africa (or whose ancestors came from Africa)

Other hypernyms of nigra include African-American, Black, Negro, Negroid, blackamoor.

nigra (noun)	Black person (noun)
(ethnic slur) extremely offensive name for a Black person	a person with dark skin who comes from Africa (or whose ancestors came from Africa)