coloured person vs Negro

coloured person and Negro both are nouns.

Word	Noun	Adjective	Verb	Adverb
coloured person	Yes	No	No	No
Negro	Yes	No	No	No

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

coloured person: a United States term for Blacks that is now considered offensive
Negro: a person with African ancestry, "Negro" and "Negroid" are archaic and pejorative today

Other hypernyms of coloured person include African-American, Black, Negroid, Black person, blackamoor.

coloured person (noun)	Negro (noun)
a United States term for Blacks that is now considered offensive	a person with African ancestry, "Negro" and "Negroid" are archaic and pejorative today