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.
piny pinny piney pin pian pion pine puny pain pony pein pina piano punny peony penny pinna pinnae pan pen pun pawn peen peon pane poon puna pone pean paean paeon panne penna penne penni
veiny viny liny meiny piny rainy tiny whiny winy shiny in