poetic rhythm vs versification

poetic rhythm and versification both are nouns.

Word	Noun	Adjective	Verb	Adverb
poetic rhythm	Yes	No	No	No
versification	Yes	No	No	No

As nouns, versification is a hypernym of poetic rhythm; that is, versification is a word with a broader meaning than poetic rhythm:

poetic rhythm (noun)	versification (noun)
(prosody) a system of versification	the art or practice of writing verse
	the form or metrical composition of a poem
	a metrical adaptation of something (e.g., of a prose text)