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.
labella label lobelia labially libel libellee labial labile liable libelee lowball lobule
labella rubella bell belay belle belly bulla abelia abolla cowbell gabelle lobelia obelia rubeola sowbelly bel