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.
calypso clypeus calipees claps clips clops calliopes callipees kalpas clepes galops collops gallops collapse glops gulps kelps keleps kelpies
calypso blypes polyps polypus slypes