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.
stuffier stuffer staffer stiffer stuiver stiver stover
daffier stuffier defier deifier differ doffer duffer beautifier deffer codifier modifier notifier ratifier staffer stiffer stuffer edifier
stuff stuffy staff stiff stiffie