[1] : The Collaborative International Dictionary of English v.0.48

blurt \blurt\ bl^urt, v. t. imp.  p. p. blurted; p. pr.
    vb. n. blurting. cf. blare.
   to utter suddenly and unadvisedly; to divulge
   inconsiderately; to ejaculate; -- commonly with out.
   1913 webster

         others . . . can not hold, but blurt out, those words
         which afterward they are forced to eat.  --hakewill.
   1913 webster

   to blurt at, to speak contemptuously of. obs. --shak.
      1913 webster
see also:
blurted blurting blare to blurt at 

[2] : WordNet (r) 2.0

blurt
     v : utter impulsively; "he blurted out the secret"; "he
         blundered his stupid ideas" syn: blurt out, blunder
         out, blunder, ejaculate
see also:
blurt out blunder out blunder ejaculate 

[3] : Moby Thesaurus II by Grady Ward, 1.0

50 moby thesaurus words for "blurt":
   allude to, babble, be indiscreet, be unguarded, betray,
   betray a confidence, blab, blabber, blurt out, burst out,
   call attention to, comment, disclose, divulge, ejaculate, exclaim,
   give away, inform, inform on, interject, leak, let drop, let fall,
   let slip, make reference to, mention, muse, note, observe, opine,
   peach, rat, refer to, reflect, remark, reveal, reveal a secret,
   sing, speak, spill, spill the beans, squeal, stool, talk, tattle,
   tattle on, tell on, tell secrets, tell tales, utter

Blurt >> B Words
Blurt, definition of term: Blurt
blurt_pag1.html

Blurt Out >> B Words
Blurt Out, definition of term: Blurt Out
blurt+out_pag1.html