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Noun convulsion has 4 senses
- paroxysm, fit, convulsion - a sudden uncontrollable attack; "a paroxysm of giggling"; "a fit of coughing"; "convulsions of laughter"
--1 is a kind of attack
- convulsion - violent uncontrollable contractions of muscles
--2 is a kind of seizure, ictus, raptus
--2 has particulars: clonus; epileptic seizure
- convulsion, turmoil, upheaval - a violent disturbance; "the convulsions of the stock market"
--3 is a kind of disturbance, disruption, commotion, stir, flutter, hurly burly, to-do, hoo-ha, hoo-hah, kerfuffle
- convulsion - a physical disturbance such as an earthquake or upheaval
--4 is a kind of trouble