Negress vs blackamoor

Negress and blackamoor both are nouns.

Word	Noun	Adjective	Verb	Adverb
Negress	Yes	No	No	No
blackamoor	Yes	No	No	No

As nouns, blackamoor is a hypernym of Negress; that is, blackamoor is a word with a broader meaning than Negress:

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

Other hypernyms of Negress include African-American, Black, Negro, Negroid, Black person.

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