an uncontrollable outburst of emotion or fear, often characterized by irrationality, laughter, weeping, etc.

Psychoanalysis . a psychoneurotic disorder characterized by violent emotional outbreaks, disturbances of sensory and motor functions, and various abnormal effects due to autosuggestion.

Psychiatry . conversion disorder.

noun

calm , control , sereneness

noun

agitation , delirium , excitement , feverishness , frenzy , hysterics , madness , mirth , nervousness , panic , unreason