Sir John Falstaff vs fictitious character

Sir John Falstaff and fictitious character both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sir John Falstaff	Yes	No	No	No
fictitious character	Yes	No	No	No

Sir John Falstaff (noun)	fictitious character (noun)
a dissolute character in Shakespeare's plays	an imaginary person represented in a work of fiction (play or film or story)