Firm up
Firm up verb - To become physically firm or solid.
Secure
Secure verb - To drive danger or attack away from.
Cite this Source
Secure and Firm up. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/firm_up/secure
Firm up & Secure. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/firm_up/secure>.
Secure or Firm up. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/firm_up/secure.
Google Ngram Viewer shows how "firm up" and "secure" have occurred on timeline