fictitious character vs Philip Marlowe

fictitious character and Philip Marlowe both are nouns.

Word	Noun	Adjective	Verb	Adverb
fictitious character	Yes	No	No	No
Philip Marlowe	Yes	No	No	No

fictitious character (noun)	Philip Marlowe (noun)
an imaginary person represented in a work of fiction (play or film or story)	tough cynical detective (one of the early detective heroes in American fiction) created by Raymond Chandler