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.
stiffed staffed stuffed citified staved steeved cityfied
tiffed stiffed staffed citified reedified ratified notified nidified codified modified edified beautified beatified doffed deified daffed stuffed
stiff stiffie staff stuff stuffy