Charybdis Maelstrom ado agitation back back stream backflow backwash backwater brouhaha bustle centrifugate centrifuge commotion countercurrent counterflow counterflux cyclone disturbance dizzy round dust devil ebullience ebullition effervescence embroilment feery-fary ferment fermentation flurry fume gulf gurge gyre hurly-burly hurricane hurry hurry-scurry maelstrom pell-mell perturbation pirouette purl rat race reel refluence reflux regurgitation round ruffle spin stir surge swirl swirling to-do tornado tumult turbulence turmoil turn twirl twister typhoon uproar vortex waterspout wheel whirl whirligig whirlpool whirlwind whorl yeastiness