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.
knowing gnawing
bowing cowing bowwowing chowing showing sowing dowing mowing knowing wowing yowing lowing towing miaowing jowing meowing vowing powwowing rowing owing wing swing shewing hawing hewing aweing jewing mawing tawing shawing chawing yawing sawing jawing sewing cawing lawing dewing chewing awing gnawing mewing pawing tewing viewing dawing wooing