irritability

(noun) an irritable petulant feeling. Synonyms: crossness, fretfulness, fussiness, peevishness, petulance, choler.

(noun) excessive sensitivity of an organ or body part. Synonyms: excitability.

(noun) a disposition to exhibit uncontrolled anger. Synonyms: temper, biliousness, peevishness, pettishness, snappishness, surliness. Example: "His temper was well known to all his employees."