Thunderous
Thunderous adjective - Extremely ominous.
Usage example: world events of thunderous import
Unpropitious and thunderous are semantically related. In some cases you can use "Unpropitious" instead an adjective "Thunderous".
Unpropitious
Unpropitious adjective - Not propitious.
Thunderous and unpropitious are semantically related. Sometimes you can use "Thunderous" instead an adjective "Unpropitious".
Mutual synonyms
Cite this Source
Unpropitious and Thunderous. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/thunderous/unpropitious
Thunderous & Unpropitious. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/thunderous/unpropitious>.
Unpropitious or Thunderous. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/thunderous/unpropitious.
Google Ngram Viewer shows how "thunderous" and "unpropitious" have occurred on timeline