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.
refuel refel rueful refell refeel refly revel ruefully reflew refill rifely refile reveal reflow refall revalue reveille ravel revile ruffly ravelly reavail roughly
fuel refuel biofuel defuel feel woeful fell waeful rueful refel foul awful refell feal lawful afoul joyful refeel rifely safely befell flue duffel full wifely befoul woful
ref reef reefy reif reify revue tref trefah