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.
melena melon millennia mullen mullein malign moulin million mullion
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
melee mel male meal mealie mealy mell mellow mewl mile mole mule muley smell smelly