any sudden, violent outburst; a fit of violent action or emotion

paroxysms of rage.

Pathology . a severe attack or a sudden increase in intensity of a disease, usually recurring periodically.

noun

agitation , anger , attack , convulsion , eruption , excitement , explosion , fit , flare-up * , frenzy , frothing , fuming , furor , fury , hysterics , outbreak , outburst , passion , rage , violence , cramp , shoot , spasm , pang , rapture , seizure , tantrum , throe