octameter vs verse

octameter and verse both are nouns.

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

As nouns, verse is a hypernym of octameter; that is, verse is a word with a broader meaning than octameter:

Other hypernyms of octameter include verse line.

octameter (noun)	verse (noun)
a verse line having eight metrical feet	a piece of poetry
	a line of metrical text
	literature in metrical form

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