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