Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Showerproof and impregnable are semantically related. In some cases you can use "Showerproof" instead an adjective "Impregnable".
Showerproof
Impregnable and showerproof are semantically related. You can use "Impregnable" instead an adjective "Showerproof".
Mutual synonyms
Cite this Source
Showerproof and Impregnable. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/impregnable/showerproof
Impregnable & Showerproof. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/impregnable/showerproof>.
Showerproof or Impregnable. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/impregnable/showerproof.
Google Ngram Viewer shows how "impregnable" and "showerproof" have occurred on timeline