I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
gemmules gimmals gimels gimbals jumbles
mules gemmules moles miles mauls fumbles hamauls humbles muleys mulls hamulus limulus gambles mumbles numbles rimless seamless smiles tamales tumulus wambles chimleys jumbles aimless fumulus cumulus ambles beamless bumbles famulus females fimbles amoles foamless males gumless loamless nombles rambles rumbles similes sumless tumbles umbles wimbles shambles