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.
penoche panoche penuche panache panocha penuchi pinch punch painch paunch poncho punchy paunchy punish
panoche penoche niche notch conchae conchie ganache manche panache panocha penuche