Rigorousness and Rigidness

Rigorousness

Rigorousness noun - The quality or state of being demanding or unyielding (as in discipline or criticism).
Usage example: the rigorousness of the training paid off when the dance students performed brilliantly at the recital

Rigidness and rigorousness are semantically related. In some cases you can use "Rigidness" instead a noun "Rigorousness".

Rigidness

Rigidness noun - The quality or state of being demanding or unyielding (as in discipline or criticism).
Usage example: no one even asked anymore, as their father's rigidness regarding bedtime was legendary

Rigorousness and rigidness are semantically related. You can use "Rigorousness" instead a noun "Rigidness".
Cite this Source
Rigidness and Rigorousness. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/rigorousness/rigidness
Rigorousness & Rigidness. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/rigorousness/rigidness>.
Rigidness or Rigorousness. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/rigorousness/rigidness.
Google Ngram Viewer shows how "rigorousness" and "rigidness" have occurred on timeline