rhythmic pattern vs poetic rhythm

rhythmic pattern and poetic rhythm both are nouns.

Word	Noun	Adjective	Verb	Adverb
rhythmic pattern	Yes	No	No	No
poetic rhythm	Yes	No	No	No

As nouns, rhythmic pattern and poetic rhythm are synonyms defined as:

Other synonyms of rhythmic pattern include prosody.

rhythmic pattern (noun)	poetic rhythm (noun)
(prosody) a system of versification	(prosody) a system of versification