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.
cookouts coquets cocottes cockatoos coequates coquettes coacts cockades coquitos cactus
backouts cookouts checkouts knockouts lookouts lockouts sickouts dakoits agoutis takeouts dugouts bugouts scouts ragouts pigouts kotos gouts shakeouts