Formidable
Formidable adjective - Requiring considerable physical or mental effort.
Usage example: running a marathon is a formidable undertaking
Uphill is a synonym for formidable in difficult topic. In some cases you can use "Uphill" instead an adjective "Formidable", when it comes to topics like onerous.
Nearby Word: formidably
Uphill
Uphill adjective - Requiring considerable physical or mental effort.
Usage example: an uphill battle to eradicate poverty in an area of the state that has never known anything else
Formidable is a synonym for uphill in arduous topic. You can use "Formidable" instead an adjective "Uphill".
Mutual synonyms
Related pairs
Cite this Source
Uphill and Formidable. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/formidable/uphill
Formidable & Uphill. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/formidable/uphill>.
Uphill or Formidable. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/formidable/uphill.
Google Ngram Viewer shows how "formidable" and "uphill" have occurred on timeline