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