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.
gradine gradin gratine gratinee gratin guardian creatine garden creatin keratin guerdon greaten curtain gueridon craton cretin cardon cordon cortin cardoon carotin cortina grutten quartan
gradine radian ratine creatine gradin gratine nardine pardine pieridine pyridine sardine sordine sourdine turdine uridine