Grievous
Grievous adjective - Difficult to endure.
Hellacious and grievous are semantically related. In some cases you can use "Hellacious" instead an adjective "Grievous".
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
Grievous and hellacious are semantically related. Sometimes you can use "Grievous" instead an adjective "Hellacious".
Mutual synonyms
Related pairs
Cite this Source
Hellacious and Grievous. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/grievous/hellacious
Grievous & Hellacious. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/grievous/hellacious>.
Hellacious or Grievous. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/grievous/hellacious.
Google Ngram Viewer shows how "grievous" and "hellacious" have occurred on timeline