• noun:   the psychological state of being irritated or annoyed
• noun:   (pathology) abnormal sensitivity to stimulation

  Example: "Any food produced irritation of the stomach"

• noun:   unfriendly behavior that causes anger or resentment
• noun:   the act of troubling or annoying someone
• noun:   an uncomfortable feeling in some part of the body
• noun:   a sudden outburst of anger
• noun:   the neural or electrical arousal of an organ or muscle or gland

Related words...