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.
griped gripped groped grouped gript carped craped creped crapped creeped cropped groupoid carpet
riped griped cirriped rapped gripped rewrapped dripped syruped cirripede larruped repped roped cropped creped creeped grouped dropped trapped tripped trouped warped chirruped prepped reaped ripped siruped urped torpedo tripod crapped craped drooped draped propped trooped groped chirped raped carped rouped harped frapped burped bewrapped wrapped sharped
grip gripe gripey grippe grippy gripy cripe gorp grape grapey grappa grapy grope