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.
den dene deny deni dean deign diene duenna din dun don dan ten done dawn dine dune teen down dino dyne dona danio donee donna donne downy teeny tenia dinghy donnee taenia teniae