The Collaborative International Dictionary of English v.0.48:

Hullabaloo \Hul`la*ba*loo"\, n. [Perh. a corruption of
   hurly-burly.]
   A confused noise; uproar; tumult. [Colloq.] --Thackeray.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hullabaloo
    n 1: disturbance usually in protest [syn: agitation,
         excitement, turmoil, upheaval, hullabaloo]

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "hullabaloo":
   Bedlam let loose, ado, agitation, babel, bedlam, blast, bobbery,
   bother, botheration, brawl, brouhaha, burst, bustle, charivari,
   chirm, clamor, clangor, clap, clatter, commotion, din, discord,
   donnybrook, drunken brawl, dustup, feery-fary, ferment,
   fidgetiness, fit, flap, flurry, fluster, flutter, flutteriness,
   fracas, free-for-all, fuss, fussiness, gaff, hell broke loose,
   howl, hubbub, hue and cry, jangle, loud noise, maelstrom, noise,
   noise and shouting, outcry, pandemonium, pother, racket, rattle,
   restlessness, rhubarb, roar, row, ruckus, ruction, rumble, rumpus,
   scramble, shindy, shivaree, spasm, spurt, stew, stir, sweat, swirl,
   thunder, thunderclap, tintamarre, to-do, tumult, unquiet, uproar,
   vociferation, vortex, whirl, whisper