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.
gowans kwanza
jawans sowans swans deewans dewans rowans wans gowans diwans seawans sewans wens twains rawins wains wanes swains sowens weans wins bwanas rowens wons rewins twins