Source : Webster's Revised Unabridged Dictionary (1913)

Hastiness \Has"ti*ness\, n.
   The quality or state of being hasty; haste; precipitation;
   rashness; quickness of temper.

Source : WordNet®

hastiness
     n 1: overly eager speed (and possible carelessness); "he soon
          regretted his haste" [syn: {haste}, {hurry}, {hurriedness},
           {precipitation}]
     2: hasty impulsiveness