Make impregnable
Protect and make impregnable are semantically related. In some cases you can use "Protect" instead a verb phrase "Make impregnable".
Protect
Protect verb - To drive danger or attack away from.
Make impregnable and protect are semantically related. You can use "Make impregnable" instead a verb "Protect".
Cite this Source
Protect and Make impregnable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/make_impregnable/protect
Make impregnable & Protect. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/make_impregnable/protect>.
Protect or Make impregnable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/make_impregnable/protect.
Google Ngram Viewer shows how "make impregnable" and "protect" have occurred on timeline