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.
sleeky sleek sulky silky sulk silk slack slake slick saluki slaggy selkie silkie sawlike silique seallike siliquae soullike
sleeky leaky leek belleek flecky cleek gleek sleek whelky
sale seel seely slew sloe slue sole solei isle