The Collaborative International Dictionary of English v.0.48:
Bristliness \Bris"tli*ness\, n. The quality or state of having bristles. [1913 Webster]WordNet (r) 3.0 (2006):
bristliness n 1: the quality of being covered with prickly thorns or spines [syn: prickliness, bristliness, spininess, thorniness]