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.
riviera riviere river riever reiver reifier rover rifer raver revery revere reaver reefier refer refry reefer refire roofer referee reoffer reverie rougher
riviera vera vier bouvier heavier jivier leavier levier livier riviere savvier wavier
rive reive review drive trivia