Source : Webster's Revised Unabridged Dictionary (1913)

Fearfulness \Fear"ful*ness\, n.
   The state of being fearful.

Source : WordNet®

fearfulness
     n 1: an emotion experienced in anticipation of some specific pain
          or danger (usually accompanied by a desire to flee or
          fight) [syn: {fear}, {fright}] [ant: {fearlessness}]
     2: the trait of being afraid [ant: {fearlessness}]