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.
pinna pinnae pina pinny penna pin pennae pennia pain pein puna pion piny pian pine piano punny penny panne penni penne piney pan pen pun hyponea hyponoia pony pane poon pawn pone peon peen pean puny
pinna inn guinea kina quinoa linn mina minny goanna nona jinni pina pennia pinnae senna sunna zinnia duenna tinny china pennae jinn canna minae anna inia hinny henna vina finny penna biennia manna liana ninny ginny pinny sienna sunnah donna tinea whinny shinny