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.
conchie conchae conch concha concho conchy cancha ganache kench quench
conchie niche nitchie banshie conchae ganache manche panache panoche penoche penuche penuchi sennachie unciae shanachie