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.
adust autist attest adduced audacity
dust adust sawdust wadset deadest haddest nudest dost dusty baddest bedsit faddist feudist saddest hadst headset oddest midst modest nudist odist rudest sadist lewdest reddest sawdusty loudest didst maddest widest