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.
xenia scena senna sienna zinnia sen seen sene sewn snaw zein zona
hymenia tenia taenia xenia hyaena wienie scena teniae genoa hyponoia taeniae genie gonia duenna zinnia senna genii sienna penni mania veena inia deni pennia henna benni venae vena penna faena genua biennia weenie sheenie hyena