Toughened
Toughened adjective - Made hard or flexible or resilient especially by heat treatment.
Treated is a synonym for toughened. In some cases you can use "Treated" instead an adjective "Toughened".
Nearby Word: toughening
Treated
Treated adjective - Made hard or flexible or resilient especially by heat treatment.
Cite this Source
Treated and Toughened. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/toughened/treated
Toughened & Treated. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/toughened/treated>.
Treated or Toughened. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/toughened/treated.
Google Ngram Viewer shows how "toughened" and "treated" have occurred on timeline