paroxysm paroxysm /ˈpærəksɪzm/

noun

1. () A sudden uncontrollable attack  ( convulsion , paroxysm , fit )
   a sudden uncontrollable attack
    A paroxysm of giggling
   a paroxysm of giggling
    A fit of coughing
   a fit of coughing
    Convulsions of laughter
   convulsions of laughter