WordNet (r) 3.0 (2006):

swivet
    n 1: a panic or extreme discomposure; "it threw her into a
         swivet"

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "swivet":
   befuddlement, bewilderment, bother, botheration, chaos, cloud,
   confusion, daze, discombobulation, discomfiture, discomposure,
   disconcertion, disorder, disorganization, disorientation,
   disturbance, dither, embarrassment, flap, flummox, flurry, fluster,
   flusteration, flustration, flutter, fog, foofaraw, frenzy, fret,
   fuddle, fuddlement, fume, fuss, haze, jumble, lather, maze, mess,
   mist, muddle, muddlement, perplexity, perturbation, pother, pucker,
   ruffle, shuffle, stew, sweat, tizzy, twitter, twitteration,
   unsettlement, upset