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.
peeped pepped piped pipped pooped popped pupped poppied pipette
jeeped peeped wheeped beeped cheeped seeped ped copped biped coped raped whapped hyped dipped hoped caped couped cooped gapped souped riped capped taped chapped reaped sped hopped oped aped hipped pupped piped speedo kneepad toped yawped yapped shipped chopped happed wiped whopped whipped zipped tupped soaped tepid leaped duped mapped hooped louped bopped upped looped spied supped gipped pied siped sapped sopped moped ripped poppied knapped pooped gypped wrapped sipped heaped cupped whooped gawped lipped kipped lopped gaped loped nipped rapped whupped peed pipped japed rouped pepped popped napped hypoed kepped zapped quipped knopped lapped fopped spaed jauped speedy speed roped repped doped mopped tapped dupped tipped topped typed wapped spued copied dapped chipped shaped shopped yauped yipped