There’s no word in English that rhymes with “orange.” Everyone knows this. But what rhymes with “problem,” “depth,” “wolf,” “elbow,” or “with”?
It turns out that there are many many words in English that fulfil this criterion, unless you cheat by adding a prefix (“in-depth”), using a homophone (“wulf”), or ignoring the fact that we pronounce th two different ways (no, “with” does not rhyme with “myth”).
There are quite a few words that only have a very obscure rhyme (“film” and “pilm”; or “music” and “ageusic”), and others that have only a single rhyme (“dwarfed” and “morphed”; “smooth” and “soothe”). Several words may rhyme depending on your accent or pronunciation, of course, or your tolerance for obscure place names (“Blorenge,” anyone?).
You must have meant that “width” does not rhyme with “myth”, because “with” does.
Haha, I knew that one would get some pushback. “With” only rhymes with “myth” in some accents – UK, Australian, and NZ English all pronounce it with a voiced /th/ sound.