Synonyms for rigor

Noun

1. asperity, grimness, hardship, rigor, rigour, severity, rigorousness, difficulty, difficultness

usage: something hard to endure; "the asperity of northern winters"

2. cogency, validity, rigor, rigour, credibility, credibleness, believability

usage: the quality of being logically valid

3. severity, harshness, rigor, rigour, inclemency, hardness, stiffness, sternness, strictness

usage: excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"