Close
Close adjective - Having little space between items or parts.
Impregnable and close are semantically related. In some cases you can use "Impregnable" instead an adjective "Close".
Impregnable
Impregnable adjective - Impossible to get through or into.
Usage example: the castle's supposedly impregnable walls
Close and impregnable are semantically related. Sometimes you can use "Close" instead an adjective "Impregnable".
Both words in one sentence
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Aramon tactics generally revolve around building an impregnable fortress that could fend off any threat long before they could even get close while building a strong army in the background to crush the remainders with.
Cite this Source
Impregnable and Close. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/close/impregnable
Close & Impregnable. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/close/impregnable>.
Impregnable or Close. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/close/impregnable.
Google Ngram Viewer shows how "close" and "impregnable" have occurred on timeline