Firm
Firm adjective - Having a consistency that does not easily yield to pressure.
Usage example: cold butter that was too firm to spread
Rigid is a synonym for firm in stiff topic. In some cases you can use "Rigid" instead an adjective "Firm", when it comes to topics like hard, inflexible, no longer soft. popular alternative
Rigid
Rigid adjective - Not allowing for any exceptions or loosening of standards.
Usage example: rigid enforcement of drug laws
Firm is a synonym for rigid in stiff topic. You can use "Firm" instead the word "Rigid" as an adjective or a noun, if it concerns topics such as characteristic, state, fixed, established. popular alternative
Mutual synonyms
Cite this Source
Rigid and Firm. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/firm/rigid
Firm & Rigid. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/firm/rigid>.
Rigid or Firm. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/firm/rigid.
Google Ngram Viewer shows how "firm" and "rigid" have occurred on timeline