Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Stable and impregnable are semantically related. In some cases you can use "Stable" instead an adjective "Impregnable".
Stable
Stable adjective - Marked by the ability to withstand stress without structural damage or distortion.
Impregnable and stable are semantically related. Sometimes you can use "Impregnable" instead an adjective "Stable".
Mutual synonyms
Cite this Source
Stable and Impregnable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/impregnable/stable
Impregnable & Stable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/impregnable/stable>.
Stable or Impregnable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/impregnable/stable.
Google Ngram Viewer shows how "impregnable" and "stable" have occurred on timeline