Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Supportable and impregnable are semantically related. In some cases you can use "Supportable" instead an adjective "Impregnable".
Supportable
Supportable adjective - Capable of being defended with good reasoning against verbal attack.
Impregnable and supportable are semantically related. Sometimes you can use "Impregnable" instead an adjective "Supportable".
Mutual synonyms
Cite this Source
Supportable and Impregnable. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/impregnable/supportable
Impregnable & Supportable. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/impregnable/supportable>.
Supportable or Impregnable. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/impregnable/supportable.
Google Ngram Viewer shows how "impregnable" and "supportable" have occurred on timeline