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.
panache panoche painch paunch panocha paunchy penoche penuche pinch punch poncho punchy penuchi punish
ganache panache nacho natch niche conchae conchie manche panoche penoche penuche sennachie snatch shanachie