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.
tiddler diddler toddler dawdler doodler deadlier detailer tattler titular tootler titulary tutelar
fiddler paddler peddler riddler huddler toddler cuddler middler coddler diddler saddler meddler tiddler waddler piddler muddler puddler saddlery goodlier cuddlier dawdler puddlier modeler ladler yodeler godlier needler sidler peddlery pedaler boodler idler pedlery pedler doodler wheedler loudlier deadlier yodler
tiddly diddle diddley diddly tidal tidally tidily toddle