Firm up
Firm up verb - To become physically firm or solid.
Usage example: wait for the modeling clay to firm up before handling the finished pot
Rigidify
Rigidify verb - Become rigid.
Mutual synonyms
Cite this Source
Rigidify and Firm up. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/firm_up/rigidify
Firm up & Rigidify. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/firm_up/rigidify>.
Rigidify or Firm up. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/firm_up/rigidify.
Google Ngram Viewer shows how "firm up" and "rigidify" have occurred on timeline