Convulsion
WordNet
noun
(1) A physical disturbance such as an earthquake or upheaval
(2) A violent disturbance
"The convulsions of the stock market"
(3) Violent uncontrollable contractions of muscles
(4) A sudden uncontrollable attack
"A paroxysm of giggling"
"A fit of coughing"
"Convulsions of laughter"
WiktionaryText
Noun
- An intense, paroxysmal, involuntary muscular contraction.
- An uncontrolled fit, as of laughter; a paroxysm.
- Violent turmoil.
- Earthquakes and convulsions of nature shake Earth on a regular basis.