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.
zaffar zaffer zaffir zaffre safari suffari safer sofar suffer
zaffar far gauffer goffer kaffir niffer piaffer reoffer gaffer feoffor suffer suffari zaffer zaffre differ duffer chaffer chuffer sofar coffer buffer offer affair fair afar fiar fear faro safari quaffer fare puffer feoffer zaffir deffer doffer whiffer chauffer shofar