Difficult and Rigorous

Similar meaning words

Difficult adjective - Requiring considerable physical or mental effort.

Usage example: difficult questions on the exam that required analytical thinking

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Rigorous is a synonym for difficult in heavy topic. In some cases you can use "Rigorous" instead an adjective "Difficult".

Nearby Word: difficulty

Rigorous adjective - Requiring considerable physical or mental effort.

Usage example: studied for umpteen months for the rigorous exam

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Difficult is a synonym for rigorous in heavy topic. Sometimes you can use "Difficult" instead an adjective "Rigorous".

Nearby Words: rigorously, rigor, rigour, rigorism

Unfortunately, the game was such a rigorous simulation that it was staggeringly difficult (even if you had a real driver's license) and virtually impossible to play competitively without hours and hours of practice.

Source: Rule of Fun

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Rigorous and Difficult. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/difficult/rigorous

Difficult & Rigorous. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/difficult/rigorous>.

Rigorous or Difficult. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/difficult/rigorous.

Google Ngram Viewer shows how "difficult" and "rigorous" have occurred on timeline