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.
credos creds creeds cruds cards curds cords courteous greeds cairds curets crowds cartes crudes crates cruets carets curtesy curites croutes cardias creates carates curates carrots corodies crowdies curettes cowrites courtesy corrades corrodes corridas grads grids grots crits carts corrodies gradus carats grouts groats grades greets curtsy gourds grides griots greats guards courts grates quartos garotes karates curtsey grottos caritas gourdes garrets quartes garottes garrotes grottoes keiretsu keratose queridas
redos credos uredos teredos reredos foredoes creds bredes breeds proteose parados roadeos ordos nerds haeredes breads jerreeds courteous jereeds herds treads weirdoes sherds greeds redds rodeos fordoes reds reeds rereads parodos oreads nereids radios creeds dreads heredes hairdos redes redoes dorados marrieds reads weirdos shreds
credo cred ocreate curette cured curd crude cruddy crud cried creed create cord cored caret cared cardio cardiae cardia card cruet curdy curet acred screed