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.
weepie weep weepy wheep whoopie whoopee wap wop
weepie pie yippie cheapie whoopie epee veepee hippie cowpie kepi kewpie nappie buppie pipe cepe sepia tawpie teepee tepee koppie chappie chippie yuppie