A MONORHYME is a poem in which all the lines have the same end rhyme. There is no set amount of syllables per line, nor any restrictions on the amount of stanzas.

Example by Dick Davis:

excerpt from A Monorhyme For The Shower

Lifting her arms to soap her hair
Her pretty breasts respond – and there
The movement of that buoyant pair
Is like a spell to make me swear
Twenty odd years have turned to air;
Now she’s the girl I didn’t dare
Approach, ask out, much less declare
My love to, mired in young despair.