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.
cattily cattail coattail cattle cattalo cuttle cutely catalo cuittle gaudily goutily coitally caudillo caudally caudal caudle coital cuddly guttle kettle kittel kittle cadelle quietly
fattily tattily ruttily nattily cattily chattily pettily dottily knottily nuttily wittily goutily nettly stilly doughtily meatily sootily rattail cattail coattail rattly haughtily til
cattie catty coati cacti scatt scatty cat