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.
pawnee pane pawn panne pan pine pain pone pean peen pian penne paean piney piano paeon pennae pinnae hyponea pen pin pun
townee pawnee nee knee jinnee nene ranee sawney donee donnee tawney townie wane ween wine