#1
rigorousness n. [
asperity, grimness, hardship, rigor, rigour, severity, severeness, rigourousness] something hard to endure; "the asperity of northern winters"
. wn #2
rigorousness n. [
severity, severeness, harshness, rigor, rigour, rigourousness, inclemency, hardness, stiffness] excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
. wn