literature vs flashback

literature and flashback both are nouns.

Word	Noun	Adjective	Verb	Adverb
literature	Yes	No	No	No
flashback	Yes	No	No	No

literature (noun)	flashback (noun)
the profession or art of a writer	a transition (in literary or theatrical works or films) to an earlier event or scene that interrupts the normal chronological development of the story
the humanistic study of a body of literature	an unexpected but vivid recurrence of a past experience (especially a recurrence of the effects of an hallucinogenic drug taken much earlier)
creative writing of recognized artistic value
published writings in a particular style on a particular subject