Undefended and Unconquerable

Undefended

Undefended adjective - Lacking protection from danger or resistance against attack.
Usage example: the cowardly soldiers fled, leaving the palace undefended

Unconquerable is an antonym for undefended.

Unconquerable

Unconquerable adjective - Incapable of being defeated, overcome, or subdued.

Undefended is an antonym for unconquerable.
Cite this Source
Unconquerable and Undefended. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/undefended/unconquerable
Undefended & Unconquerable. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/undefended/unconquerable>.
Unconquerable or Undefended. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/undefended/unconquerable.
Google Ngram Viewer shows how "undefended" and "unconquerable" have occurred on timeline