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
Taxing and hellacious are semantically related. In some cases you can use "Taxing" instead an adjective "Hellacious".
Taxing
Taxing adjective - Requiring much time, effort, or careful attention.
Hellacious and taxing are semantically related. Sometimes you can use "Hellacious" instead an adjective "Taxing".
Mutual synonyms
Related pairs
Cite this Source
Taxing and Hellacious. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/hellacious/taxing
Hellacious & Taxing. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/hellacious/taxing>.
Taxing or Hellacious. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/hellacious/taxing.
Google Ngram Viewer shows how "hellacious" and "taxing" have occurred on timeline