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.
believes beliefs bolivias bailiffs blaffs bluffs
relieves slieves believes delves lowlives sleeves selves relives relievos releves pelves glaives olives cleaves helves elves lives levees leaves deleaves sleaves shelves