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.
causeys causes cases coseys cusses cuisses gausses caseose casease gases casus casas coses cassis cosies guises cussos cozeys gasses caseous cassias guesses gussies quasses gauzes gooses kisses kussos gaseous koussos
causeys uses touses douses tusses causes coseys cusses rouses louses gausses hoseys mouses nauseas pauses pusses wusses chiauses guises souses muses mousses fusses bouses fuses fusees busses busies moseys susses buses musses nouses puses reuses ruses houses chausses chouses