Tom Sawyer vs fictitious character

Tom Sawyer and fictitious character both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tom Sawyer	Yes	No	No	No
fictitious character	Yes	No	No	No

Tom Sawyer (noun)	fictitious character (noun)
the boy hero of a novel by Mark Twain	an imaginary person represented in a work of fiction (play or film or story)