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.
koussos kussos cussos kisses cusses kazoos guesses quasses cuisses gausses gussies quassias gazoos causes gasses gooses guises cassis caseose caseous cassias causeys gaseous
koussos cussos kussos wusses tusses pusses gneissose musses mousses lassos gausses lassoes cusses gessoes fusses busses bassos susses tussis chausses sos