Make impregnable
Secure and make impregnable are semantically related In some cases you can replace term "Secure" with "Make impregnable", this terms are similar.
Secure
Secure verb - To drive danger or attack away from.
Make impregnable and secure are semantically related in protect topic. You can use "Make impregnable" instead a verb "Secure", if it concerns topics such as make safe.
Mutual synonyms
Cite this Source
Secure and Make impregnable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/make_impregnable/secure
Make impregnable & Secure. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/make_impregnable/secure>.
Secure or Make impregnable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/make_impregnable/secure.
Google Ngram Viewer shows how "make impregnable" and "secure" have occurred on timeline