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.
pennae penne penna pinnae pennia panne penni penny pinna pen puna pina peen pein peon pean paean paeon peony pinny punny pawnee hyponea pan pin pun hyponoia
pinnae pennae nae donne duenna henna minae zonae sunnah nona sienna anna choanae venae manna nene goanna cannie canna johnnie jinnee teniae biennia bonnie penna faunae pinna zinnia sunna senna pennia bonne none benne penne nine nannie panne donna donnee taeniae tonne shinney