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.
carotid cardioid carted garoted garroted garotted garrotted crated carded created grouted curated courted crowded corroded grottoed corotate keratoid curetted garreted grided curded grated credit corded greeted quartet gridded gritted crudded guarded curtate cordite cordate crawdad crudity quirted
carotid parotid garoted garroted parotoid parroted partied proteid sortied dirtied
cart carat carate caret carrot carroty carte croute garote garotte acaroid ecarte scart scrota