verse vs epos

verse and epos both are nouns.

Word	Noun	Adjective	Verb	Adverb
verse	Yes	No	Yes	No
epos	Yes	No	No	No

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

verse: literature in metrical form
epos: a body of poetry that conveys the traditions of a society by treating some epic theme

Other hyponyms of verse include epic poetry, heroic poetry.

verse (noun)	epos (noun)
a piece of poetry	a long narrative poem telling of a hero's deeds
a line of metrical text	a body of poetry that conveys the traditions of a society by treating some epic theme
literature in metrical form

verse (verb)	epos (verb)
familiarize through thorough study or experience
compose verses or put into verse