Efficacious
Efficacious adjective - Producing or capable of producing a desired result.
Undefeated and efficacious are semantically related. In some cases you can use "Undefeated" instead an adjective "Efficacious".
Undefeated
Efficacious and undefeated are semantically related. Sometimes you can use "Efficacious" instead an adjective "Undefeated".
Mutual synonyms
Cite this Source
Undefeated and Efficacious. (2016). Retrieved 2026, July 27, from https://thesaurus.plus/related/efficacious/undefeated
Efficacious & Undefeated. N.p., 2016. Web. 27 Jul. 2026. <https://thesaurus.plus/related/efficacious/undefeated>.
Undefeated or Efficacious. 2016. Accessed July 27, 2026. https://thesaurus.plus/related/efficacious/undefeated.
Google Ngram Viewer shows how "efficacious" and "undefeated" have occurred on timeline