Rigor
noun
the quality of being valid and rigorous
Similar: cogency, validity, rigour
noun
something hard to endure
“the asperity of northern winters”
Similar: asperity, grimness, hardship, rigour, severity, severeness
noun
excessive sternness
“severity of character”
Similar: severity, severeness, harshness, rigour, rigorousness, rigourousness
Word family
rigorism · rigorist