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.
tiddly diddly tidily tidally diddley tidal toddle deadly diddle dottily tattily dedal title doughtily daddle daedal dawdle detail doodle tautly tittle dowdily totally
fiddly piddly cuddly diddly oddly tiddly puddly waddly muddly rowdily deadly noddle madly needily duly seedily redly piddle moodily saddle muddle paddle ridley goodly raddle puddle reedily reddle ruddily rudely sadly daddle diddle cuddle toddle widdle beadily shadily loudly waddle coddle buddle idly riddle diddley dowdily gaudily lewdly readily peddle muddily huddle badly giddily middle godly nudely heddle ruddle headily fiddle bodily addle medley fuddle bawdily tidily weedily widely meddle shoddily
teddy tide tidy tied toddy giddied kidded lidded ridded tedded tided tidied