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.
pul pull puli pule pula pal pulley ply pol poll pool plie poly pele pile peal paly pole plow plew pial pily peel pall pale polo pail play pill pawl plea pili ploy polio pally pilei pilau pilaw poilu palea pilea paella paleae pallia pillow pollee