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
Testing and hellacious are semantically related. In some cases you can use "Testing" instead an adjective "Hellacious".
Testing
Testing adjective - Requiring considerable physical or mental effort.
Usage example: beginning rock climbers should choose a less testing route to the summit
Hellacious and testing are semantically related. Sometimes you can use "Hellacious" instead an adjective "Testing".
Mutual synonyms
Related pairs
Cite this Source
Testing and Hellacious. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/hellacious/testing
Hellacious & Testing. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/hellacious/testing>.
Testing or Hellacious. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/hellacious/testing.
Google Ngram Viewer shows how "hellacious" and "testing" have occurred on timeline