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.
cortin cortina cretin curtain carotin creatin carrotin creatine carton cordon croton gratin cowritten keratin cartoon gratine crouton carotene cartoony gratinee cardon craton gradin cardoon gradine greaten grutten quartan cretonne guardian
cortin martin burton verdin hearten carotin carrotin carton ferritin curtain creatine ratine partan pertain ceratin serotine tartan chorten cortina rutin gratine routine retina retain reattain creatin cretin gratin retine marten keratin quartan martini parton protein certain serotiny torten shorten
cart court cocreate curt crit crate cowrote cowrite corrody carte corrode corrida corrade corody cored cord scored