Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Unchallengeable and impregnable are semantically related. In some cases you can use "Unchallengeable" instead an adjective "Impregnable".
Unchallengeable
Unchallengeable adjective - Not capable of being challenged or proved wrong.
Impregnable and unchallengeable are semantically related. Sometimes you can use "Impregnable" instead an adjective "Unchallengeable".
Nearby Word: unchallenged
Mutual synonyms
Related pairs
- firm and impregnable
- firm and unchallengeable
- unalterable and impregnable
- unalterable and unchallengeable
- stable and impregnable
- stable and unchallengeable
- unquestionable and impregnable
- unquestionable and unchallengeable
- absolute and impregnable
- absolute and unchallengeable
- irresistible and impregnable
- irresistible and unchallengeable
- indisputable and impregnable
- indisputable and unchallengeable
Cite this Source
Unchallengeable and Impregnable. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/impregnable/unchallengeable
Impregnable & Unchallengeable. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/impregnable/unchallengeable>.
Unchallengeable or Impregnable. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/impregnable/unchallengeable.
Google Ngram Viewer shows how "impregnable" and "unchallengeable" have occurred on timeline