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.
gally galley gall gayly gully golly gaily gal gulley gull goal gala gley gaol gale call galah coaly kelly cully galea colly gluey calla galeae goalie coolly callee cullay callow gul glow kail glee coal cull clay kale caul glue calo cloy glia coly kill
ally rally gally dually pally tally leally really dally sally bally chally wally all valley hall felly bully phalli foully galley lily delly calla gully allay cully mulley daily volley jelly dilly jolly hilly shelly shall chilly willy welly pulley wall dolly gilly dully challa maill vealy mall filly gall mealy sall fall golly lall paly coolly alley gaily holly hallo colly molly pall coaly tall call alloy sully rawly silly belly ball folly gayly kelly cullay bialy fully illy knolly gulley nelly telly billy walla waly wholly woolly lolly shaley shaly shoaly