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.
poppied popped pipped pepped pooped poppet pupped piped peeped puppet paupiette pipet pupate pipette
poppied pied pupped pipped copped popped piped knopped cupped nipped mopped lopped lapped kipped kepped wrapped gapped sipped spied zapped dapped dupped tipped tupped wapped whipped whupped chipped shipped yapped repped capped pepped ripped rapped bopped napped knapped mapped quipped copied lipped fopped happed hipped hopped gipped gypped sapped sopped supped zipped dipped tapped topped upped whapped whopped chapped chopped shopped yipped ped