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