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.
flat float folate floaty flauta felt flit foliate filiate fellate fault flute fleet flyte fluty flout flota fluyt filet flite fealty flutey faulty fillet velate valuate violate vallate fallout volt fled fold fluid volte vault flued flood filed valet flied felid fauld volta field volti