Formidable
Formidable adjective - Causing fear.
Headstrong and formidable are semantically related. In some cases you can use "Headstrong" instead an adjective "Formidable".
Nearby Word: formidably
Headstrong
Headstrong adjective - Given to resisting control or discipline by others.
Formidable and headstrong are semantically related. Sometimes you can use "Formidable" instead an adjective "Headstrong".
Mutual synonyms
Cite this Source
Headstrong and Formidable. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/formidable/headstrong
Formidable & Headstrong. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/formidable/headstrong>.
Headstrong or Formidable. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/formidable/headstrong.
Google Ngram Viewer shows how "formidable" and "headstrong" have occurred on timeline