Source : Webster's Revised Unabridged Dictionary (1913)

Tumultuous \Tu*mul"tu*ous\, a. [L. tumultuosus: cf. F.
   tumultueux.]
   1. Full of tumult; characterized by tumult; disorderly;
      turbulent.

            The flight became wild and tumultuous. --Macaulay.

   2. Conducted with disorder; noisy; confused; boisterous;
      disorderly; as, a tumultuous assembly or meeting.

   3. Agitated, as with conflicting passions; disturbed.

            His dire attempt, which, nigh the birth Now rolling,
            boils in his tumultuous breast.       --Milton.

   4. Turbulent; violent; as, a tumultuous speech.

   Syn: Disorderly; irregular; noisy; confused; turbulent;
        violent; agitated; disturbed; boisterous; lawless;
        riotous; seditious. -- {Tu*mul"tu*ous*ly}, adv. --
        {Tu*mul"tu*ous*ness}, n.

Source : WordNet®

tumultuousness
     n : a state of commotion and noise and confusion [syn: {tumult},
          {uproar}, {garboil}]