ague arrhythmia brokenness bumpiness capriciousness chattering choppiness chorea cold shivers desultoriness disconnectedness discontinuity eccentricity erraticness fibrillation fitfulness fluctuation inconstancy intermittence irregularity jactation jactitation jerkiness joltiness nonuniformity palsy patchiness quaking quavering quivering roughness shakes shaking shivering shivers shuddering spasms spasticity sporadicity sporadicness spottiness stagger succussion trembling tremulousness uncertainty unevenness unmethodicalness unpredictability unsteadiness unsystematicness variability vibration whimsicality wobble