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
Mutual synonyms
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