rigorousness

Noun rigorousness has 2 senses

• rigorousness(n = noun.attribute) asperity, grimness, hardship, rigor, rigour, rigourousness, severeness, severity - something hard to endure; "the asperity of northern winters"
is a kind of difficultness, difficulty
has particulars: sternness

• rigorousness(n = noun.attribute) hardness, harshness, inclemency, rigor, rigour, rigourousness, severeness, severity, stiffness - excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
is a kind of sternness, strictness
Derived forms adjective rigorous₂, adjective rigorous₁