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.
dun dune dan don tun duenna den din dean dyne deni deny tune done dine tuna dawn dino dene down dona diene donna donee donne tauon downy deign danio tunny dinghy donnee