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.
chippered choppered
kippered coppered loppered lippered choppered lappered peppered zippered chippered speared speired reappeared diapered appeared supered capered coopered papered speered spiered peered coappeared tapered paupered rapiered
chipper chippier chopper shipper