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.
beagle beguile bogle bugle begall boggle baggily bigly bacula boucle buckle bacalao
beagle eagle glue gley glee galea gale fugle goalie haggle joggle giggle guggle locale miggle ogle regale wriggle scale daggle waggle gaggle kale quale goggle agley agly boggle bogle bugle vagal aglee higgle juggle jiggle ligule macle niggle raggle reglue cicale zooglea toggle wiggle
bag beg baggie baggy beak beaky