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.
heredes haeredes herds hordes hardies hurdies hards hurds hayrides hearties hearts hoards hairdos hardass heriots harts hertz hurts
redes haeredes bredes heredes reds hurdies hardies redos irides jerreeds credos joyrides erodes creeds gourdes corrodes creds crudes grades grides greets derides charades weirdies uredos trades teredos hydrides reredos greeds prudes perdues oreides nereids merdes redds borides hordes breads bourrides reads breeds rides burdies hayrides reeds corrades redoes bardes foredoes birdies fordoes aretes rodes brides jereeds irades marrieds nereides oreads parades prides rereads sarodes dreads tardies tirades treads ureides weirdoes shreds
herd hared heard heired hereat hereto hired