(n.) The quality of being impulsive.

abruptness alacrity capriciousness desultoriness deviability eccentricity erraticism expeditiousness feverishness fickleness flightiness forwardness freakishness furiousness haste hastiness hurriedness impatience impetuosity impetuousness impulse inconsistency inconstancy instability irregularity mercuriality moodiness overhastiness precipitance precipitancy precipitateness precipitation precipitousness precociousness precocity prematureness prematurity promptness quickness rashness recklessness restlessness rush shiftiness speed suddenness swiftness uncertainty undependability unfixedness uninhibitedness unpredictability unreliability unrestraint unsettledness unstableness unsteadfastness unsteadiness untimeliness variability variation variety wantonness waywardness whimsicality