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.
cardias caritas cards carats cairds carates carts creds cords corridas corodies crits curds crowdies cruds corrodies guards crowds carets creeds credos cartes crudes karats karates curites carrots cowrites queridas corrades corrodes grits grads grids karts courts curets griots crates quarts greeds kraits grides curtsy cruets gourds gratis kurtas gradus grades garotes quartes croutes curtsey curtesy curates creates quartos gourdes garrets
cardias giardias triads sardius purdahs pardahs myriads lariats queridas corridas hurdies caritas hardies hardass veritas burdies birdies redias purdas tardies weirdies
cardia cardiae cardio card caird cared caried carried acarid