Heroic
Heroic adjective - Feeling or displaying no fear by temperament.
Impregnable and heroic are semantically related. In some cases you can use "Impregnable" instead an adjective "Heroic".
Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Heroic and impregnable are semantically related. Sometimes you can use "Heroic" instead an adjective "Impregnable".
Mutual synonyms
Cite this Source
Impregnable and Heroic. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/heroic/impregnable
Heroic & Impregnable. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/heroic/impregnable>.
Impregnable or Heroic. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/heroic/impregnable.
Google Ngram Viewer shows how "heroic" and "impregnable" have occurred on timeline