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.
deny den dean dene deni deign teeny diene downy duenna dinghy don dun din dan ten down dune done dona tiny dyne dino dawn dine tony teen danio donee donna donne tawny tenia tinny toney towny tunny