Hellacious
Hellacious adjective - Extreme in degree, power, or effect.
Substantial and hellacious are semantically related. In some cases you can use "Substantial" instead an adjective "Hellacious".
Substantial
Substantial adjective - Of a size greater than average of its kind.
Usage example: the amount he inherited was quite substantial, so he quit his job and set out to see the world
Hellacious and substantial are semantically related. Sometimes you can use "Hellacious" instead an adjective "Substantial".
Cite this Source
Substantial and Hellacious. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/hellacious/substantial
Hellacious & Substantial. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/hellacious/substantial>.
Substantial or Hellacious. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/hellacious/substantial.
Google Ngram Viewer shows how "hellacious" and "substantial" have occurred on timeline