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.
cortina cortin cretin curtain creatin carotin carrotin creatine cowritten croton gratin cordon carton keratin gratine cartoon crouton carotene cartoony gratinee cardon craton gradin cardoon gradine greaten grutten quartan
cortina cortin certain retinae rutin ferritin carotin carrotin retina curtain cretin gratin keratin martin martini pertain ceratin tartana