1. (

• asperity ,
• grimness ,
• hardship ,
• rigor ,
• rigour ,
• severity ,
• severeness ,
• rigorousness ,
• rigourousness

) something hard to endure; "the asperity of northern winters" ;

2. (

• cogency ,
• validity ,
• rigor ,
• rigour ,

) the quality of being valid and rigorous ;

3. (

• severity ,
• severeness ,
• harshness ,
• rigor ,
• rigour ,
• rigorousness ,
• rigourousness ,
• inclemency ,
• hardness ,
• stiffness ,

) excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp" ;