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.
reattained retained rattened retinued rattooned retuned ratooned retinite retinoid retint reddened redenied redonned rotund redound
attained reattained retained stained detained tined tanned tineid tinned mutined mutinied patinaed patined retinued staned