The Collaborative International Dictionary of English v.0.48:
Injuriousness \In*ju"ri*ous*ness\, n. The quality of being injurious or hurtful; harmfulness; injury. [1913 Webster]WordNet (r) 3.0 (2006):
injuriousness n 1: destructiveness that causes harm or injury [syn: harmfulness, injuriousness]