line of poetry vs line of verse

line of poetry and line of verse both are nouns.

Word	Noun	Adjective	Verb	Adverb
line of poetry	Yes	No	No	No
line of verse	Yes	No	No	No

As nouns, line of poetry and line of verse are synonyms defined as:

line of poetry (noun)	line of verse (noun)
a single line of words in a poem	a single line of words in a poem