featherbrained

from WordNet (r) 3.0 (2006)

featherbrained
    adj 1: lacking seriousness; given to frivolity; "a dizzy
           blonde"; "light-headed teenagers"; "silly giggles" [syn:
           {airheaded}, {dizzy}, {empty-headed}, {featherbrained},
           {giddy}, {light-headed}, {lightheaded}, {silly}]

from The Collaborative International Dictionary of English v.0.48

featherbrained \feath"er*brained\, feather-brained
\feath"er-brained\, a.
   Giddy; frivolous; lacking seriousness; given to frivolity;
   feather-headed. [Colloq.]

   Syn: airheaded, dizzy, empty-headed, giddy, lightheaded,
        light-headed, silly.
        [1913 Webster + WordNet 1.5]

from Moby Thesaurus II by Grady Ward, 1.0

42 Moby Thesaurus words for "featherbrained":
      birdbrained, birdwitted, brainless, capricious, dizzy,
      empty-headed, featherheaded, fickle, flighty, fluffy, fluttery,
      frivolous, frothy, gaga, giddy, giddy-brained, giddy-headed,
      giddy-pated, giddy-witted, harebrain, harebrained, impulsive,
      light, rattlebrained, rattleheaded, rattlepated, scatterbrained,
      scramblebrained, shallow, shallow-headed, shallow-minded,
      shallow-pated, shallow-witted, shatterbrained, silly, skittish,
      superficial, thoughtless, unprofound, volatile, whimsical,
      witless

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