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.
reoffer refer roofer reefer reefier referee reifier rover rifer refry revery riever reaver revere reiver refire reverie rougher raver river riviera
feoffer reoffer offer coffer doffer goffer chaffer whiffer quaffer hoofer piaffer roofer iffier duffer puffier loafer huffier buffer buffier chauffer chuffer feoffor zaffer deffer coiffeur puffery gaffer differ gofer daffier niffer goofier puffer fifer miffier gauffer suffer woofer chaffier chauffeur chuffier fer