Grueling and Hellacious

Grueling

Grueling adjective - Requiring considerable physical or mental effort.
Usage example: running a marathon is grueling

Hellacious and grueling are semantically related. In some cases you can use "Hellacious" instead an adjective "Grueling".

Hellacious

Hellacious adjective - Requiring considerable physical or mental effort.
Usage example: the pioneers survived a particularly hellacious river crossing with their covered wagon barely in one piece

Grueling and hellacious are semantically related. Sometimes you can use "Grueling" instead an adjective "Hellacious".
Cite this Source
Hellacious and Grueling. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/grueling/hellacious
Grueling & Hellacious. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/grueling/hellacious>.
Hellacious or Grueling. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/grueling/hellacious.
Google Ngram Viewer shows how "grueling" and "hellacious" have occurred on timeline