Unrhyme

As in Emily Dickinson there is too a fastidious precision of thought where unrhymes fill the purpose better than rhymes

Source: wiktionary

a class of hackwriters arose whose job was to unrhyme the verse chronicles of the trouvere and to render them in the common speech of the day

Source: wiktionary

He half-rhymes "one" and "groan," clearly unrhymes "still" with "days," and seems unconcerned that the second "Shiloh" has no rhyming mate.

Source: wiktionary

"Unrhyming" — translating from verse to prose — while common in late medieval France, was relatively rare in England: coincidentally, the Gilte Legende unrhymes its verse sources

Source: wiktionary