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.
graded grided grated guarded gridded gradate corraded graduate carded corded curded crated greeted created curated crawdad gritted crudded garoted grouted crowded grottoed garreted garotted garroted corroded garrotted crawdaddy carted credit cordate cordite courted curtate gordita quirted cardioid corotate curetted gratuity keratoid
breaded treaded corraded dreaded traded graded paraded serrated lariated herded braided radded pirated guarded aurated carded brooded borated lorded muriated curated ridded hydrated corroded bradded horded shrouded chorded weirded treated crowded birdied rodded raided birded prided seriated berated crawdaddy bearded forded barded cerated reeded gridded lyrated girded eroded grated derated gyrated aerated hoarded farded prodded deaerated readied marauded parodied derided readded narrated orated corded crated reded laureated larded grided crudded prated redded rated created variated boarded curded warded worded shredded yarded
grad grade garda gardai grat grate great grid gride groat grody