nastiness in WordNet English dictionary

1. malevolence by virtue of being malicious or spiteful or nasty
   cattiness  bitchiness  spite  spitefulness  nastiness 
   
2. a state characterized by foul or disgusting dirt and refuse
   filth  filthiness  foulness  nastiness 
   
3. the quality of being unpleasant
   "I flinched at the nastiness of his wound"
   nastiness