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