Tough
Tough adjective - Not easily chewed.
Undefeatable and tough are semantically related. In some cases you can use "Undefeatable" instead an adjective "Tough".
Undefeatable
Tough and undefeatable are semantically related. Sometimes you can use "Tough" instead an adjective "Undefeatable".
Mutual synonyms
Cite this Source
Undefeatable and Tough. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/tough/undefeatable
Tough & Undefeatable. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/tough/undefeatable>.
Undefeatable or Tough. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/tough/undefeatable.
Google Ngram Viewer shows how "tough" and "undefeatable" have occurred on timeline