FLAW, sudden gust or squall of wind.
FLAWN, custard.
FLEA, catch fleas.
FLEER, sneer, laugh derisively.
FLESH, feed a hawk or dog with flesh to incite it to the chase; initiate in blood-shed; satiate.
FLICKER-MOUSE, bat.
FLIGHT, light arrow.
FLITTER-MOUSE, bat.
FLOUT, mock, speak and act contemptuously.
FLOWERS, pulverised substance.