Source : Webster's Revised Unabridged Dictionary (1913)

Blameworthy \Blame"wor`thy\, a.
   Deserving blame; culpable; reprehensible. --
   {Blame"wor`thi*ness}, n.

Source : WordNet®

blameworthiness
     n : a state of guilt [syn: {culpability}, {culpableness}]