rigorousness

nouns

something hard to endure
"the asperity of northern winters"
asperity, grimness, hardship, rigor, rigorousness, rigour, rigourousness, severeness, severity
excessive sternness
"severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
hardness, harshness, inclemency, rigor, rigorousness, rigour, rigourousness, severeness, severity, stiffness
is derived from
rigorous
is derived from
rigorous