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.
coil col coly cole cowl cool cola coal cooly coala coaly colly coyly coolie collie coulee coolly calo clay cull gaol kohl kilo kolo claw clew call clue cloy koel kill kola goal caul kail koala quill quail calla guile golly gaily cully quoll
boil foil coil moil noil oil reoil roil soil toil