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.
averred afeared avert afeard afford afraid afreet
averred deferred referred wavered viverrid levered ferried quivered havered hoovered hovered coffered differed chauffeured buffered goffered liveried feared revered cyphered sphered syphered fevered covered ferret refereed niffered gauffered quavered laveered veered offered louvered reoffered overed afeared ciphered severed suffered livered furred beavered wafered chaffered shivered