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.
viably viable fable feebly foible ghibli fabliau
viably suably ably sable tabla doable sabal babul suable rubbly knobbly able labially bally bialy nubbly wabbly chubbily nobbily babel bubbly nebuly label table doubly pebbly feebly nobly seeable gable wobbly liable cable cabal hubbly viable fable shabbily