Acceptable
Acceptable adjective - Of a level of quality that meets one's needs or standards.
Impregnable and acceptable are semantically related. In some cases you can use "Impregnable" instead an adjective "Acceptable".
Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Acceptable and impregnable are semantically related. Sometimes you can use "Acceptable" instead an adjective "Impregnable".
Mutual synonyms
Cite this Source
Impregnable and Acceptable. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/acceptable/impregnable
Acceptable & Impregnable. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/acceptable/impregnable>.
Impregnable or Acceptable. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/acceptable/impregnable.
Google Ngram Viewer shows how "acceptable" and "impregnable" have occurred on timeline