Formidable
Formidable adjective - Causing fear.
Illustrious and formidable are semantically related. In some cases you can use "Illustrious" instead an adjective "Formidable".
Nearby Word: formidably
Illustrious
Illustrious adjective - Standing above others in rank, importance, or achievement.
Formidable and illustrious are semantically related. Sometimes you can use "Formidable" instead an adjective "Illustrious".
Nearby Word: illustration
Mutual synonyms
Cite this Source
Illustrious and Formidable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/formidable/illustrious
Formidable & Illustrious. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/formidable/illustrious>.
Illustrious or Formidable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/formidable/illustrious.
Google Ngram Viewer shows how "formidable" and "illustrious" have occurred on timeline