The Collaborative International Dictionary of English v.0.48:
Pluckiness \Pluck"i*ness\, n. The quality or state of being plucky. [1913 Webster]WordNet (r) 3.0 (2006):
pluckiness n 1: the trait of showing courage and determination in spite of possible loss or injury [syn: gutsiness, pluck, pluckiness] [ant: gutlessness]