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