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.
marbly marble morbilli mirabelle
burbly marbly trebly durably drably grubbily garble curably crabbily corbel gerbil herbal verbal horribly variably burble bearably barbel barbal marble rubbly dribbly terribly warble