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.
pool pol poly polo pole poll poilu polio pollee ply pal pul plea puli pial plie plow ploy pula pail peal pily pili peel pile pale pawl plew pule play pill pele pall paly pull palea pally pilau pilaw pilea pilei
fool cool mool pool tool wool shool