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.
crudes cruds cruets croutes creds curds cards cords corrodes crowdies corodies corrades cairds crowds credos creeds cartes crates grides grades carets curets corrodies curtesy cardias curites curates gourdes creates carates curettes courtesy cowrites corridas grids crits carts grads courteous grates greeds greets grouts gradus greats curtsy guards carats krauts courts gourds garrets quartes karates curtsey garotes carrots caritas garottes garrotes grottoes queridas
crudes prudes routes burds grades brutes corodies irides corrodes croutes hayrides druids marauds redes cruets fordoes gourdes frauds rudds sarodes haeredes nereides shrewdies borides weirdoes ureides parades turds trades tardies rodes bredes oreides derides bardes bourrides perdues rowdies hordes hurds virtues corrades curds crowdies cruds hardies heredes burdies druidess hurdies reroutes irades readies birdies roadeos foredoes rodeos gourds parodies corrodies joyrides prides roadies brides grides oroides surds redoes nurds hydrides erodes tirades triodes rides urds weirdies merdes charades shrouds
crud cruddy crude card cardia cardiae cardio cord cred credo croute cruet curd curdy