giddiness

from WordNet (r) 3.0 (2006)

giddiness
    n 1: an impulsive scatterbrained manner [syn: {giddiness},
         {silliness}]
    2: a reeling sensation; a feeling that you are about to fall
       [syn: {dizziness}, {giddiness}, {lightheadedness}, {vertigo}]

from The Collaborative International Dictionary of English v.0.48

Giddiness \Gid"di*ness\, n.
   The quality or state of being giddy.
   [1913 Webster]