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.
penne pennae panne penny penna penni pen pinnae pennia peon pein pane pone pean pine peen paean punny pinny peony piney pinna paeon pawnee pan pin hyponea pun pian poon puna pawn pony pina piny pain pion puny
benne penne fenny bene eyne bonnie bonne benny none benni johnnie nene leone penny renew seine senna dene donne duenna weenie wienie sheenie venue venae gene penni hygiene jenny jinnee cannie nannie nine genie panne pennae penna henna pinnae scene sene sienna diene donnee tonne wenny sheeney shinney