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.
dahl dal dahlia dial dual deal dale dally daily dually del dol tael dole deli tala doll tali dele dill diol dell tale tail duly diel teal deil tall duel dull dolly delly dooly doyly doily dilly dully dulia delay tally doula