Rigorous and Rigid

Rigorous

Rigorous adjective - Given to exacting standards of discipline and self-restraint.
Usage example: a rigorous football coach who pushes his players to their physical and mental limits

Rigid is a synonym for rigorous in strict topic. In some cases you can use "Rigid" instead an adjective "Rigorous", when it comes to topics like severe. popular alternative

Nearby Words: rigorously, rigor, rigour, rigorism

Rigid

Rigid adjective - Not allowing for any exceptions or loosening of standards.
Usage example: rigid enforcement of drug laws

Rigorous is a synonym for rigid in strict topic. You can use "Rigorous" instead an adjective "Rigid", if it concerns topics such as stiff, severe. popular alternative

Nearby Words: rigor, rigidity, rigidly
Cite this Source
Rigid and Rigorous. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/rigorous/rigid
Rigorous & Rigid. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/rigorous/rigid>.
Rigid or Rigorous. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/rigorous/rigid.
Google Ngram Viewer shows how "rigorous" and "rigid" have occurred on timeline