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.
sulfas sulphas selfs selvas sylvas silvas sluffs slaves salivas salvias slaveys sleaves selloffs salifies selves salves salvos sylphs solves salvoes sleeves sleighs slieves sloughs
alfas sulfas ulvas sylvas selvas calfs silvas selfs pilafs kalifs gulfs golfs clefs califs vulvas rolfs volvas lavs alifs alefs luffas loofas loofahs pelfs halvas delfs wolfs