rigor

Noun

• excessive sternness
  • severity of character
    
  • the harshness of his punishment was inhuman
    
  • the rigors of boot camp
    

• the quality of being valid and rigorous

• something hard to endure
  • the asperity of northern winters
    

Related words

• Synonyms: 
  cogency , validity , rigour , asperity , grimness , hardship , severity , severeness , rigorousness , rigourousness