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.
ruefully rueful refly refall ruffly refill refell refuel ravelly refel refile reflew refeel reflow rifely roughly reveille ravel revel reveal revile ruffle
fully awfully joyfully lawfully ruefully woefully wofully full felly filly folly foully fly