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.
cole col coulee collie coolie clew coil coal cowl clue cola coly cool cooly colly coyly coala coaly callee goalie coolly kale glue goal claw gale cloy kola clay kohl call gley caul calo cull glee kolo koel gaol guile quale koala calla golly gluey galea cully quoll
bole vole haole hole jole cole mole ole pole role sole dole tole whole