Uncle Tom vs blackamoor

Uncle Tom and blackamoor both are nouns.

Word	Noun	Adjective	Verb	Adverb
Uncle Tom	Yes	No	No	No
blackamoor	Yes	No	No	No

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

Uncle Tom: (ethnic slur) offensive and derogatory name for a Black man who is abjectly servile and deferential to Whites
blackamoor: a person with dark skin who comes from Africa (or whose ancestors came from Africa)

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

Uncle Tom (noun)	blackamoor (noun)
a servile black character in a novel by Harriet Beecher Stowe	a person with dark skin who comes from Africa (or whose ancestors came from Africa)
a servile black character in a novel by Harriet Beecher Stowe
(ethnic slur) offensive and derogatory name for a Black man who is abjectly servile and deferential to Whites