darky vs Black person

darky and Black person both are nouns.

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

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

darky: (ethnic slur) offensive term for Black people
Black person: a person with dark skin who comes from Africa (or whose ancestors came from Africa)

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

darky (noun)	Black person (noun)
(ethnic slur) offensive term for Black people	a person with dark skin who comes from Africa (or whose ancestors came from Africa)