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.
halvas halvahs halavahs halves helves
vulvas ulvas selvas sylvas volvas silvas halvas luvs salivas halves elves delves salvias sulfas clivias halavahs valves wolves pelvis pelves lavas halvahs solves alfas calves salves salvos pilafs helves selves bolivias lavs shelves
halva halvah halve halavah half helve khalif khalifa