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