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.
swang swank swing swung sawing sewing sowing swanky swink
swang twang mawing mewing cowing cawing lawing jewing jowing swing jawing hewing sewing dawing dowing rowing tewing pawing hawing whang chawing chowing shewing yawing vowing bowing mowing swung knowing bowwowing gnawing meowing miaowing wing awing lowing owing viewing powwowing wank swank dewing sowing tawing sawing towing wowing chewing shawing showing yowing
swan swanny sewan swain swine swinney