Formidable
Formidable adjective - Causing fear.
Impregnable and formidable are semantically related in dreadful topic. In some cases you can use "Impregnable" instead an adjective "Formidable", when it comes to topics like horrible.
Nearby Word: formidably
Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Formidable and impregnable are semantically related in dreadful topic. Sometimes you can use "Formidable" instead an adjective "Impregnable".
Mutual synonyms
Related pairs
- forbidding and formidable
- forbidding and impregnable
- strong and formidable
- strong and impregnable
- powerful and formidable
- powerful and impregnable
- hard and formidable
- hard and impregnable
- tough and formidable
- tough and impregnable
- fierce and formidable
- fierce and impregnable
- frightful and formidable
- frightful and impregnable
Cite this Source
Impregnable and Formidable. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/formidable/impregnable
Formidable & Impregnable. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/formidable/impregnable>.
Impregnable or Formidable. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/formidable/impregnable.
Google Ngram Viewer shows how "formidable" and "impregnable" have occurred on timeline