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.
galena glen gallein galleon glean gallon galloon clean gluon callan kalian kaolin cauline colleen guyline kaoline
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
gale galeae galea gal glue egal gley aglee glee goalie gayly gluey gala gaol galah gaily goal gally kale galley agley gall ogle