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.
hardies hurdies hards haeredes hayrides hearties hoards hordes heredes hairdos hardass harts herds hurds hearts heriots hurts
birdies tardies hurdies hardies weirdies burdies curites rewrites crowdies bardes grades norites pyrites corrodies verites derides writes marrieds sardius dirties barites giardias corrades brides shorties weirdoes trades sarodes sorites bredes rowdies priedieus ferrites hearties bourrides irades borides cardias perdues haeredes hordes parties rodes frites gourdes heredes merdes prudes corrodes corodies cowrites parades cerites prides rides grides hydrides forties diorites yperites crudes joyrides irides hayrides rites roadies fordoes erodes readies redes tirades parodies sorties charades shrewdies
hard hairdo hardy hared harried hayride heard hoard