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.
gracious gracioso griseous grazioso graces grouses coriaceous graecize curacies grosz crasis groszy grazes grosze greases crazies courses grosses grasses grecize carouses curassows carassows crisis crozes cruces cruses gorses crases crazes crises krises
ferocious veracious voracious gracious precious araceous coriaceous gracioso ceraceous sericeous