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.
redly reedily readily reddle rudely redial ridley retally rowdily ruddily radially ratel retell radula riddle retile ruddle retail rattly retool raddle radial ruttily radialia ritually rotl
redly delly puddly pedal fiddly muddly needily moodily ruddily ridley sadly madly medley quietly deadly lewdly steely diddley duly dowdily telly tidily godly wedel bawdily wetly beadily whitely badly shadily nudely bedel bodily lately piddly oddly readily muddily mutely meetly rowdily reedily rudely loudly medal goodly daedal seedily delay dedal cutely diddly cuddly tiddly gaudily waddly idly weedily headily wheedle giddily widely needle shoddily
red redo uredia cred ired brede bred rued reedy reed rediae read redia rede redd ready readd credo uredo