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.
cruddy crud curdy crude crowdy corody corrody card curd cord cred cared creed cured credo grody crowd cored cruet caird cried curred croute greedy caried cardia cardio grouty cardiae carried carroty corrade corrida corrode crowdie curried