stock epithet vs epithet

stock epithet and epithet both are nouns.

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

As nouns, epithet is a hypernym of stock epithet; that is, epithet is a word with a broader meaning than stock epithet:

stock epithet: a descriptive word or phrase which an author regularly or standardly uses to describe an object or, more often, a person.
epithet: descriptive word or phrase

stock epithet (noun)	epithet (noun)
a descriptive word or phrase which an author regularly or standardly uses to describe an object or, more often, a person.	descriptive word or phrase
	a defamatory or abusive word or phrase