fictitious character vs Cheshire cat

fictitious character and Cheshire cat both are nouns.

Word	Noun	Adjective	Verb	Adverb
fictitious character	Yes	No	No	No
Cheshire cat	Yes	No	No	No

fictitious character (noun)	Cheshire cat (noun)
an imaginary person represented in a work of fiction (play or film or story)	a fictional cat with a broad fixed smile on its face; created by Lewis Carroll