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.
crowded corroded curded corded carded crawdad crudded corraded crawdaddy crated grided graded credit carted curated cordate guarded created garoted cordite grouted gridded courted carotid garotted grottoed cardioid garroted curetted corotate garrotted grated crudity curtate gradate greeted gritted quirted
crowded rodded brooded eroded forded horded corded corroded lorded parodied prodded worded chorded shrouded
crowd crowdie crowdy corody scrod