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.
petrous pedros peters petters pewters poetries paters pitiers putters padders powders potters patters powters pouters puttiers potteries padres
goitrous nitrous petrous citrous tours strows citrusy toros torous outrows nitros hydrous detours trois metros cuatros vitreous tiros torus nitroso notorious odorous heteros stroys stours citrus retros trios trows taros citreous faitours butyrous tyros truss trues troys uterus