Make impregnable
Make safe and make impregnable are semantically related. In some cases you can use "Make safe" instead a verb phrase "Make impregnable".
Make safe
Make impregnable and make safe are semantically related. You can use "Make impregnable" instead a verb phrase "Make safe".
Mutual synonyms
Cite this Source
Make safe and Make impregnable. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/make_impregnable/make_safe
Make impregnable & Make safe. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/make_impregnable/make_safe>.
Make safe or Make impregnable. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/make_impregnable/make_safe.
Google Ngram Viewer shows how "make impregnable" and "make safe" have occurred on timeline