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.
pledge pledgee plage pelage pillage hypallage
fledge knowledge pledge sledge ledge college pledgee mileage kludgey kludge allege fledgy bludge lodge liege ledgy sludge
pale palea paleae pele pile pilea pilei plea plew plie pole pule