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.
gauffer gaffer goffer quaffer gofer coffer kaffir goofier coiffeur caver kafir gopher quaver quiver cougher quavery quivery
gauffer suffer chuffer chauffer buffer duffer puffer deffer reoffer gaffer puffier zaffer whiffer doffer niffer piaffer coiffeur quaffer miffier puffery offer huffier chaffier coffer daffier iffier differ goffer fifer chaffer feoffer chaufer buffier chauffeur chuffier fer