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.
foal fowl fall feal foil fool fail foul folio folia foley folly fallow follow foully faille fly flu fil fuel vial flew veal flea fila vale full filo fell flaw vail viol flue flow feel floe vole flay flee fill file fley fille voile feyly viola fillo value ghoul vealy fella phial filly flawy voila felly fully