Similar word to shakinesses:

alternation, anxiety, capriciousness, changeability, changeableness, disequilibrium, disquiet, fickleness, fitfulness, flightiness, fluctuation, fluidity, frailty, hesitation, immaturity, impermanence, inconsistency, inquietude, insecureness, insecurity, irregularity, irresolution, mutability, oscillation, pliancy, precariousness, restlessness, transience, uncertainty, unfixedness, unpredictability, unreliability, unstableness, unsteadiness, unsureness, vacillation, variability, volatility, vulnerability, wavering, weakness