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.
rudely ruddily redly ruddle ridley retally ruttily reedily readily rowdily ritually radially ratel rutile rattly ritual retile radial reddle radula redial retool retell raddle riddle retail radiale radulae radialia
rudely nudely widely del medley duly badly telly bedel bawdily model beadily muddily dele seedily idly diddley steely tidily lately duel goodly headily mutely gaudily diel deal piddly readily reedily rowdily loudly wedel madly shoddily wetly quietly giddily ruddily muddly lewdly cutely bedell delay deil fiddly ideal dell deli delly bodily godly cuddly meetly moodily deadly shadily whitely weedily waddly tiddly diddly seidel dowdily sadly ridley redly puddly oddly needily yodel
rude rede ride rode rodeo rudd ruddy rued crud cruddy crude cruet prude trued