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.
refired refried refereed referred reoffered revered revert
fired refired wafered suffered faired fared fiord freed fried buffered coffered coiffured gauffered goffered niffered offered refried reoffered differed chaffered
refire reefier refer referee refry reifier prefire