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.
citrous citreous citrus citrusy citers ciders stroys stours strows sitars sitters stoures suitors suiters stereos stirs stars ceders sutras satyrs stores stairs stress straws cyders steres cedars strays strews stares steers strass sataras satires seaters setters siddurs souters storeys sutures
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