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.
multure moulter muleteer melter milter molter maltier miltier moulder mouldier military militaria melder milder molder malodor moldier
culture vulture multure litre filature philtre haltere cloture kultur saltire