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.
doum douma dom dome doom duma dumb dumbo duomo doomy dummy duomi dim tom dam dame deem deme demo demy dime tomb tome toom tommy tummy
dough doughy dought doughty do