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