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.
diol dol deil dill doll dial diel dole daily dooly dilly doily doyly dolly doula doolee doyley doolie dal til del tolu tole tola dell till dele tail duly deal deli duel dahl dull tile dale toil dual toll tool dally delay delly dulia dully toile