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.
gluon gallon galleon galloon glen clon clown clone glean colon colone coloni colony galena cullion gallein guyline clan kiln
gluon lion luna loon colone galleon colony galloon clon clown hellion mullion melon pelon violone flown pleon bullion reloan felon saloon loin solon lone talion blown chalone lown loan aloin phylon alone balloon colon cullion coloni gallon jillion clone halon million lune nylon felony luny pillion bouillon pylon eloin salon billion solion belon zillion billon talon ballon shalloon
glow glue gluey aglow igloo iglu