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.
galleon gallon galloon gallein galena glen gluon glean callan cullion colleen clon clone clown clean colon colone coloni colony kalian kaolin cauline guyline kaoline
galleon villein woollen sullen pollen pillion mullen million gallon gallein cullion colleen jillion hellion fallen leone bullion bouillon billon billion balloon ballon galloon mullein mullion pleon relleno zillion shalloon
galley gale gall callee galea galeae gally gulley gal