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.
teapot depot tapeta tappet taped tepid tapped tippet
teapot pot apt wrapt coapt repot rapt leapt kaput copout caput spout boughpot capote apod pout poet sapota spot depot bowpot sapote chapt
teapoy tap tapa tape taupe tawpie teepee tepa tepee tepoy atap etape step steppe