Strengthen
Strengthen verb - To make more harsh, uncompromising, or severe.
Usage example: a bill was introduced to strengthen punishments for hate crimes
Stiffen is a synonym for strengthen in fortify topic. In some cases you can use "Stiffen" instead a verb "Strengthen", when it comes to topics like ossify. popular alternative
Nearby Words: strength, strengthening
Stiffen
Stiffen verb - To make more harsh, uncompromising, or severe.
Usage example: plans to further stiffen the already onerous requirements for admission to the elite military unit
Strengthen is a synonym for stiffen in ossify topic. You can use "Strengthen" instead a verb "Stiffen", if it concerns topics such as make or become harder. popular alternative
Mutual synonyms
Cite this Source
Stiffen and Strengthen. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/strengthen/stiffen
Strengthen & Stiffen. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/strengthen/stiffen>.
Stiffen or Strengthen. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/strengthen/stiffen.
Google Ngram Viewer shows how "strengthen" and "stiffen" have occurred on timeline