Hellacious
Hellacious adjective - Extreme in degree, power, or effect.
Rad and hellacious are semantically related. In some cases you can use "Rad" instead an adjective "Hellacious".
Rad
Rad noun - A unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material.
Hellacious and rad are semantically related. Sometimes you can use "Hellacious" instead an adjective "Rad".
Mutual synonyms
Cite this Source
Rad and Hellacious. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/hellacious/rad
Hellacious & Rad. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/hellacious/rad>.
Rad or Hellacious. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/hellacious/rad.
Google Ngram Viewer shows how "hellacious" and "rad" have occurred on timeline