unrhyme
/ʌnrɑɪm/Definitions
1. noun
A line of poetry that does not rhyme with the preceding or following line.
“The poet’s use of unrhyme added a unique touch to the poem’s lyrical quality.”
2. verb
To make or render (a line or verse) without rhyme.
“The poet deliberately unrhymed the final stanza to convey a sense of disillusionment.”