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.
filo fillo fil foil fail floe file fila fill flow folio filly fille faille fallow flooey fellow flooie follow felloe flu fly vial vail fley fall foul fuel veil vile viol foal flue feel flaw flew flea fell flee fool flay full feal vill fowl villa voila phial villi feyly felly viola fully folly flawy fella foley folia voile