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.
doom doomy dom toom dome doum douma duomi duomo tom dam dim deem duma demy dame deme dime tomb demo dumb tome dumbo dummy tommy
boom loom room zoom doom toom om