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.
pelvis pelves pelfs pahlavis pluviose pluvious pilafs pilaffs ploughs
pelvis valves wolves televise sylvas silvas selvas salvias volvas pahlavis clivias levis luvs alifs bolivias elves levies vulvas pelves ulvas delves solves selves salvos salves kalifs lavs clevis calves califs helves halves halvas shelves