F4L1E1E1T1
8 points
FLEET is validvalid
swift [adj FLEETER, FLEETEST] : FLEETLY [adv], FLEETNESS [n] / to move swiftly [v FLEETED, FLEETING, FLEETS] : FLEETINGLY [adv]
swift, also FLITT [adj FLEETER, FLEETEST, FLEETLY] / to move swiftly [v -ED, -ING, -S]