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.
ferreter fretter feretory frettier frater fritter fruiter frotteur verdure fioriture
ferreter ureter hurter barter barretry frater narrater perter partier prater quarter purtier greeter sorter grater garroter dirtier crater tartier carter treater courtier barrater rater charter shirtier barretor quartier fretter cowriter heartier pretor retro irater writer artery retry parroter porter pearter retear artier krater rewriter greater darter garter tarter curter tireder courter triter wartier chertier shorter
ferret ferrety feared ferrate ferried ferrite furred