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.
merde merit mired mured murid maraud marred moored myriad married mart mort
merde birdie boride parade nerdy pardie grade queered crude perdue perdie pride joyride corrade horde cered sered jeered hydride rode tirade rude trode heard weird beard charade beret sheered barde ride bourride prude leered oreide nerd pardee gourde gride corrode perdu peered perdy jerid joyrode herd sarode rede irade deride veered tiered erode trade hayride ureide bride weirdie brede cheered burdie sherd