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.
pylon pleon pelon pillion plan plain plane plena paulownia paulin poleyn pollen pollinia
phylon pylon nylon billon cullion gluon ballon loin lone loon eloin aloin jillion colon coloni gallon alone lion pillion loan lown hellion salon solion xylan talion chalone million belon felony balloon saloon solon clone reloan clon halon bullion violone felon flown bouillon talon zillion blown mullion billion galleon colony galloon colone melon clown pelon pleon shalloon