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.
teapoy tepoy tap tape tapa typy tepa typo topo tepee typey tippy topoi teepee dap tip top tup
teapoy apo happy heapy capo gappy gapy nappy pappy sappy sepoy soapy zappy tepoy cheapo