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.
duly dully dually dull dual duel doily dooly delay dulia delly doyly daily dolly dilly dally doula doyley duello duelli dol del dal dole tule deal dahl deil dill dele diol deli diel doll dial dale dell tally telly tulle