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.
waws was wows waes ways whews wos wis woos wise wiss wees whys wuss woes ywis wazoo wheys whose whoso wussy
vaws saws shaws chaws waws taws daws raws haws paws gnaws maws laws caws jaws yaws as