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.
greeds greets creeds grads creds grids grades gradus grates guards credos greats gourds grides garrets creates garotes gourdes garrotes grottoes curettes garottes grits cruds cards grots cords curds garrottes crates crudes cartes crowds groats griots gratis grouts cairds curets cruets carets carates quartes curtesy karates cardias curites croutes grottos curates corodies corrades corridas corrodes courtesy cowrites crowdies keiretsu queridas
reeds creeds breeds jereeds greeds jerreeds rereads haeredes redes reds reads dreads oreads teredos nerds creds sherds treads uredos redos aretes redds herds marrieds greets nereids reredos breads heredes bredes credos parietes shreds
greed greedy greet creed gored great agreed egret