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.
ruddles riddles reddles raddles rutiles ridleys rodless roadless redials radulas retiles rattles rituals rootles radials rootless ritualize retallies rotls reutilize ratals ratels retails retells retools
addles puddles widdles ruddles reddles buddles noddles waddles daddles diddles meddles huddles muddles middles paddles fiddles raddles heddles fuddles peddles riddles saddles piddles cuddles coddles toddles padles bedless budless heedless beadles ediles aidless diddlies dawdles toadless diddleys nodules doodles deles weedless idles dales aediles odyles chadless leadless headless audiles needless caudles lidless modules doles hoodless ladles sidles medleys godless poodles oodles deedless foodless boodles roadless seedless rodless wheedles needles woodless noodles ridleys yodles
ruddle raddle reddle riddle ruddily rudely