Formidable
Formidable adjective - Requiring considerable physical or mental effort.
Usage example: running a marathon is a formidable undertaking
Rugged and formidable are semantically related In some cases you can use "Rugged" instead an adjective "Formidable".
Nearby Word: formidably
Rugged
Rugged adjective - Requiring considerable physical or mental effort.
Usage example: even more rugged than most ultramarathons, this one crosses a desert
Formidable and rugged are semantically related in difficult topic. Sometimes you can use "Formidable" instead an adjective "Rugged".
Mutual synonyms
Related pairs
Cite this Source
Rugged and Formidable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/formidable/rugged
Formidable & Rugged. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/formidable/rugged>.
Rugged or Formidable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/formidable/rugged.
Google Ngram Viewer shows how "formidable" and "rugged" have occurred on timeline