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.
stellas steels steles stills steals stulls stalls steelies cedillas stiles styles stales stools sotols stylus stoles settles seidels citolas cedulas seatless seedless setulous stoolies sedulous sidles saddles stylise stylize
stellas patellas delays dells duellos tells tellys bedells vitellus cadelles latillas medullas outtells retells cedillas
stella stall steal steel steelie steely stela stelae stelai stele still stilly stull