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.
coiffeur coiffure coffer goffer cover gofer gaffer quaffer gauffer goofier cougher caver caviar covary gopher kaffir quiver
coiffeur chauffeur doffer chauffer duffer differ daffier suffer puffer puffier offer miffier buffer buffier feoffer chuffer chaffier fifer chaffer feuar deffer zaffer reoffer puffery piaffer niffer goffer quaffer gauffer gaffer coiffure whiffer coffer huffier iffier chuffier fer fur