severeness in WordNet English dictionary

1. something hard to endure
   "the asperity of northern winters"
   asperity  grimness  hardship  rigor  rigour  severity  severeness  rigorousness  rigourousness 
   
2. extreme plainness
   austereness  severity  severeness 
   
3. used of the degree of something undesirable e.g. pain or weather
   badness  severity  severeness 
   
4. excessive sternness
   "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
   severity  severeness  harshness  rigor  rigour  rigorousness  rigourousness  inclemency  hardness  stiffness 
   

severeness in English Wiktionary