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.
dodo doodoo dowdy diode doody did tod dad dot dud didy dido dote tody duad deed doty dada doat dato dado toot dude dead doit died dotty duddy datto ditto didie deedy daddy toddy teddy today