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.
feeble feebly fable foible fibula viable fabliau
feeble bole labile mobile gabble gable cobble noble nibble nubile hobble jubile feebly rabble pebble roble viable belle rubble bile sable fable suable blew dibble blue double blae tubule kibble wobble libelee bale able foible quibble lobule coble gabelle cable nobble nebule nubble habile jebel belie pueblo obole rebel bubale abele rouble bobble ruble bubble seeable bauble dabble babble doable bible table gobble wabble liable chaebol