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.
cloy coly clay calo colly cully cooly coaly coyly callow cullay coolly col gley cool cull cowl kilo caul cole coal cola glow claw call kolo coil clew clue calla gally gayly gluey golly gully kelly coala gaily