Uncle Tom vs fictional character

Uncle Tom and fictional character both are nouns.

Word	Noun	Adjective	Verb	Adverb
Uncle Tom	Yes	No	No	No
fictional character	Yes	No	No	No

Uncle Tom (noun)	fictional character (noun)
a servile black character in a novel by Harriet Beecher Stowe	an imaginary person represented in a work of fiction (play or film or story)
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