Mammoth Uncensored Word List:
40 - 14 letter words starting with fr

fractionalised fractionalises fractionalisms fractionalists fractionalized fractionalizes fractionations fractographies fragmentations fragrantnesses franchisements frangibilities frankheartedly fraternisation fraternization fraudulentness freakishnesses freehandedness freewheelingly freneticnesses frequentations frequentatives frequentnesses frictionlessly friendlessness friendlinesses fringillaceous frolicsomeness frontierswoman frontierswomen frontispiecing frontolacrimal frontoparietal frontosphenoid frontotemporal fructiferously fructification fruitarianisms fruitfulnesses frumpishnesses