Open English Wordnet
Adjectives
(s)convulsive, spasmodic, spasticaffected by involuntary jerky muscular contractions; resembling a spasm“convulsive motions”, “his body made a spasmodic jerk”, “spastic movements”
(s)convulsiveresembling a convulsion in being sudden and violent“a convulsive rage”, “convulsive laughter”