We call it Awful Waffle, based on a Board Game called Brain Strain. They had "Awful Waffle" as an example.
https://boardgamegeek.com/boardgame/8785/brain-strain
I made a proof-of-concept daily game: https://awfulwaffle.jonabrams.com/
Is the example meant to rhyme, or is it an example of a subtle category of "words that only rhyme in some English accents"? "Offle Woffle" is somewhat standard American English, while "Orful Warful" would be British English.