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.
possum passim
possum sum sumo assume fusuma hassium caesium coassume lissom museum passim reassume resume cesium
posse pass popsie epos passe passee piss poesy pois poise poos pose posy poussie pows puss pussy apos pops popsy