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.
plena pleon poleyn pollen plan pollinia pelon plain plane pylon paulownia paulin pillion
galena melena plena woolen ulna sullen salina pollen pleon glen alien olein mullein lean leno lien luna baleen galleon fallen glean poleyn mullen relleno villein sileni clean xylene colleen ulnae gallein woollen
pale palea paleae pele pile pilea pilei plea plew plie pole pule