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