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.
creeds creds greeds credos creates cruds cords cards curds curettes cruets cairds carets cartes crudes crates greets curets crowds cardias curtesy carates croutes curates curites corridas corrodes courtesy cowrites corodies crowdies corrades grads grids carts crits courteous corrodies gradus grides carats grates courts greats gourds curtsy guards grades quartes carrots curtsey garotes garrets gourdes caritas karates garottes garrotes grottoes 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
creed cried ocreate caret cored create cred credo cared cured cruet curet curette greed greedy greet acred screed