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.
craped crapped carped creped creeped cropped carpet griped groped gripped grouped crept crypt crypto corrupt groupoid
raped reaped craped draped drooped trouped parapet torpedo burped larruped roped repped rapped groped chirruped warped rapid crapped riped propped cirriped siruped ripped rouped griped tripped carped syruped urped rewrapped trapped creeped wrapped dripped creped cropped prepped trooped chirped dropped cirripede gripped bewrapped myriapod harped grouped frapped sharped
crap crappie crappy crape crepy scrapie cripe scrap carp carpi crepe crepey crop grapey grappa grapy croppie scrape grape scrappy