1. (n.) The quality of being readily excited; proneness to be affected by exciting causes.

2. (n.) The property manifested by living organisms, and the elements and tissues of which they are constituted, of responding to the action of stimulants; irritability; as, nervous excitability.

bearishness bitchiness cantankerousness churlishness contrariness crabbedness crankiness crossness crustiness devilment devilry deviltry difficultness disagreeability dourness evil intent excitability fractiousness frowardness harmfulness hatefulness huffiness huffishness iniquitousness invidiousness irascibility irritability maleficence malice malice aforethought malice prepense maliciousness malignance malignancy malignity meanness nastiness noxiousness orneriness perverseness perversite perversity snappishness stuffiness sulkiness sullenness testiness ugliness waspishness waywardness wickedness wrongheadedness