Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Redoubtable and impregnable are semantically related. In some cases you can use "Redoubtable" instead an adjective "Impregnable".
Redoubtable
Redoubtable adjective - Causing fear.
Impregnable and redoubtable are semantically related. Sometimes you can use "Impregnable" instead an adjective "Redoubtable".
Nearby Word: redoubt
Mutual synonyms
Related pairs
- firm and impregnable
- firm and redoubtable
- resolute and impregnable
- resolute and redoubtable
- steadfast and impregnable
- steadfast and redoubtable
- forbidding and impregnable
- forbidding and redoubtable
- strong and impregnable
- strong and redoubtable
- powerful and impregnable
- powerful and redoubtable
- staunch and impregnable
- staunch and redoubtable
Cite this Source
Redoubtable and Impregnable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/impregnable/redoubtable
Impregnable & Redoubtable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/impregnable/redoubtable>.
Redoubtable or Impregnable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/impregnable/redoubtable.
Google Ngram Viewer shows how "impregnable" and "redoubtable" have occurred on timeline