7
grimness(noun, discipline, firmness, severity, harshness)
7
obstinacy(strictness, stubbornness)
6
chill(noun, cold, coldness, coolness, conditions)
6
exactitude(noun, care, truth, severity, harshness)
6
inexorability(strictness, obstinacy, stubbornness)
6
preciseness(noun, care, truth, severity, harshness)
6
roughness(noun, severity, harshness, strictness, exactness)
6
trial(noun, trouble, worry, difficulty, sorrow)
6
vicissitude(noun, trouble, easy, blow, difficulty)
5
affliction(noun, trouble, blow, distress, care)
5
cogency
5
correctness(noun, care, precision, accuracy, exactness)
5
difficulty(noun, trouble, easy, blow, distress)
5
distress(noun, trouble, blow, difficulty, care)
5
prudery(firmness, rigidity)
5
tribulation(noun, trouble, blow, distress, care)
4
chilliness(noun, cold, coldness, coolness)
4
delicacy
4
faultlessness(noun, correctness, precision, accuracy)
4
firmness(noun, severity, harshness, toughness, strictness)
11 years ago|9.6k views|share |citing 
APASmart Define. (2015). rigor thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/rigor/thesaurus/synonyms
ChicagoSmart Define. 2015. "rigor thesaurus" https://smartdefine.org/rigor/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, rigor thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/rigor/thesaurus/synonyms>.
MLASmart Define. "rigor thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/rigor/thesaurus/synonyms>