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.
clon colon clone clown colone coloni colony clan cullion gluon clean colin cline callan gallon cauline colleen galleon galloon glen kiln glean
ballon gallon solon salon pylon pelon nylon melon colon belon clon halon phylon felon bouillon billon talon