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.
flu flue fly fil flew fool flaw filo foil fuel flea fley feal fila fill flee flay foal file fell fowl fail fall floe full flow foul feel fully foley flawy fella filly fillo felly folly feyly folia fille folio value faille fallow fellah felloe fellow flooey flooie follow foully