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.
refall refell refill refel refly ruefully reveal reflow reflew refuel rueful refeel refile reavail revalue ravelly reveille ravel revel rival revile rifely ruffly ravioli
fall refall dewfall befall refell beefalo refill cavally phalli cavalla jovially buffalo befell offal coevally full fell feal fail navally ovally foal fill
ref reave reavow reef reefy reif reify greave tref trefah