(n.) The quality or state of being irascible; irritability of temper; irascibleness.

aggressiveness agitability bearishness bellicosity belligerence bickering bitchiness cantankerousness churlishness combativeness combustibility contentiousness contrariness crabbedness crankiness crossness crustiness cussedness difficultness disagreeability dissension dissent dissidence dourness edginess emotional instability emotionalism eruptiveness excitability excitableness explosiveness faction factiousness flak fractiousness frowardness huffiness huffishness infighting inflammability irritability latent violence litigiousness meanness nervousness orneriness partisan spirit partisanship perturbability perverseness perversite perversity prickliness pugnacity quarrelsomeness sensitivity shrewishness skittishness snappishness startlishness stuffiness sulkiness sullenness tempestuousness testiness touchiness ugliness violence waspishness waywardness wrongheadedness