#1
rigor n. [
asperity, grimness, hardship, rigour, severity, severeness, rigorousness, rigourousness] something hard to endure; "the asperity of northern winters"
. wn #2
rigor n. [
cogency, validity, rigour] the quality of being valid and rigorous
. wn #3
rigor n. [
severity, severeness, harshness, rigour, rigorousness, rigourousness, inclemency, hardness, stiffness] excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
. wn