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.
kaphs caphs kophs kafs kiaughs kvas kaifs kavas kivas kvass qophs kavass quaighs kefs kifs
caphs kaphs typhus tophs syphs sophs scyphus raphis raphes ouphs loofahs ouphes qophs kophs ephas ephahs aphis phis tophes tophus shivahs