King Arthur vs fictitious character

King Arthur and fictitious character both are nouns.

Word	Noun	Adjective	Verb	Adverb
King Arthur	Yes	No	No	No
fictitious character	Yes	No	No	No

King Arthur (noun)	fictitious character (noun)
a legendary king of the Britons (possibly based on a historical figure in the 6th century but the story has been retold too many times to be sure); said to have led the Knights of the Round Table at Camelot	an imaginary person represented in a work of fiction (play or film or story)