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.
pawnor pawner panier panner pannier penner penury pinery pinier pinner punier punner pioneer punnier
pawnor nor tenour downer snore noir nori fawner honor honour junior manor canoer minor owner pawner senior senor senora donor tenor yawner
pawn pawnee pan pain pane panne pean pian piano span spawn