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.
dean den dan dawn dene deni deny diene deign danio duenna din ten tan dun don tain dune dine dyne teen down dino done dona donee donna donne downy tauon tawny teeny tenia tinea
bean jean quean lean mean paean pean dean wean yean an en