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.
surfer surfier surefire server serovar
surfer verifier troffer draffier briefer rarefier proofer proffer prefer gruffier gruffer carver furfur reefier reefer roofer rifer reoffer reifier refer purifier server surfier terrifier turfier