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
Problematic and hellacious are semantically related. In some cases you can use "Problematic" instead an adjective "Hellacious".
Problematic
Problematic adjective - Requiring exceptional skill or caution in performance or handling.
Hellacious and problematic are semantically related. Sometimes you can use "Hellacious" instead an adjective "Problematic".
Mutual synonyms
Cite this Source
Problematic and Hellacious. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/hellacious/problematic
Hellacious & Problematic. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/hellacious/problematic>.
Problematic or Hellacious. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/hellacious/problematic.
Google Ngram Viewer shows how "hellacious" and "problematic" have occurred on timeline