delineation vs epithet

delineation and epithet both are nouns.

Word	Noun	Adjective	Verb	Adverb
delineation	Yes	No	No	No
epithet	Yes	No	No	No

As nouns, epithet is a hyponym of delineation; that is, epithet is a word with a more specific, narrower meaning than delineation:

Other hyponyms of delineation include portrait, portraiture, portrayal.

delineation (noun)	epithet (noun)
representation by drawing or painting etc	descriptive word or phrase
a drawing of the outlines of forms or objects	a defamatory or abusive word or phrase
a graphic or vivid verbal description