The Collaborative International Dictionary of English v.0.48:
Fearfulness \Fear"ful*ness\, n. The state of being fearful. [1913 Webster]WordNet (r) 3.0 (2006):
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, fearfulness, fright] [ant: bravery, fearlessness] 2: the trait of being afraid [ant: fearlessness]