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.
defeats defats deviates davits duvets devotes tuffets devotees taffetas tofts tufts dights divots divides
defeats feats fats fets haffets tuffets taffetas defats caveats fetus buffets fiats fetes fetas fatso fates whiffets