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.
garble garboil grabble gribble curable gorbelly grubbily corbeille corbel corbeil curably crabbily
burble marble garble warble wearable triable barbal rabble drabble hearable verbal marbly corbel barbel hirable sharable trueblue durable fribble barrable fireable errable burbly brabble bearable terrible arable gribble rubble barbule ruble rouble verbile horrible curable gerbil hireable herbal parable friable wirable grabble roble hyperbole pourable dribble tearable treble trouble variable shareable
garb carb carbo carboy grab grabby grebe grub grubby