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.
crowds crowdies cords curds creds cards cruds corrodes corodies corrodies credos crudes cairds creeds croutes cardias carrots corridas corrades cowrites grads grots carts grids crits courteous grides crates courts cruets cartes guards grades greeds griots carets curets gradus gourds grouts carats groats curtsy quartos caritas grottos gourdes curates curites carates curtesy curtsey creates garotes courtesy curettes garottes garrotes grottoes keratose queridas
crowds roads choroids chords triodes hydroids sords sarodes periods lords rodes rods roods aroids arrowwoods broads broods byroads erodes fiords fords viroids cords corrodes parodos prods sarods droids toroids words chorioids shrouds
crowd crowdie crowdy corody cowrite cowrote croute scrod scrota