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.
whid whidah wide whit whity widow white widdy whitey widdie whydah wad wud wed wit wadi wait what wady wade whet wood weed wite woad waddy weedy wheat witty woody wooed