most addlebrained (adjective) bird-brained: giddy
Sinonime: alacrity, briskness, bustle, carelessness, celerity, dash, dispatch, drive, expedition, expeditiousness, fleetness, flurry, foolhardiness, hastiness, heedlessness, hurly-burly, hurriedness, hustle, hustling, impatience, impetuosity, incautiousness, nimbleness, pace, precipitancy, precipitateness, prematureness, press, promptitude, promptness, quickness, rapidity, rapidness, rashness, recklessness, rush, scamper, scramble, scurry, scuttle, swiftness, urgency, velocity
Antonime: delay,
leisure, lingering,
rest, slowness