Negroid vs Black

Negroid and Black both are nouns.

Word	Noun	Adjective	Verb	Adverb
Negroid	Yes	No	No	No
Black	Yes	No	No	No

As nouns, Negroid and Black are synonyms defined as:

Negroid and Black: a person with African ancestry, "Negro" and "Negroid" are archaic and pejorative today

Other synonyms of Negroid include African-American, Negro.

Negroid (noun)	Black (noun)
a person with African ancestry, "Negro" and "Negroid" are archaic and pejorative today	a person with African ancestry, "Negro" and "Negroid" are archaic and pejorative today
	popular child actress of the 1930's (born in 1928)
	British chemist who identified carbon dioxide and who formulated the concepts of specific heat and latent heat (1728-1799)