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.
col coil cool cole coly coal cola cowl coyly coaly coala colly cooly collie coulee coolie coolly clew kolo goal kohl clue caul claw koel gaol cloy cull call clay kola calo calla cully golly koala quoll callee callow cullay goalie