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.
flea file flew fley flue flay flaw fila floe flee feal fella folia fille foley flawy flooey felloe faille fellah flooie fil flu fly foil veal fail foul fuel filo feel vile fall fool fill vale fell flow vole full fowl vela foal fully voile phyle viola phyla vealy felly filly fillo folio feyly folly voila value villa
lea flea ilea galea quelea olea palea pilea plea la