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.
commonness commons communes combines commence gumminess communize communise camions cummins gammons gameness gaminess cumins caimans caymans gamines kimonos gombeens
commonness meanness humanness demoness womanness