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.
diddley diddle diddly tiddly daddle dawdle toddle deadly tidily doodle dowdily dottily tidally dedal doughtily tidal title daedal detail dottle tittle tattily
diddley giddily puddly piddly oddly peddle fiddle fiddly muddly heddle fuddle huddle cuddle daddle tiddly ruddle waddle ridley widdle reddle buddle addle medley puddle piddle noddle paddle muddily middle muddle meddle cuddly coddle diddle saddle diddly ruddily toddle riddle waddly raddle shoddily