Decline
Decline noun - A gradual sinking and wasting away of mind or body.
Usage example: her sad decline from a robust athlete to an old woman with arthritis
Regression is a synonym for decline in slipping back topic. In some cases you can use "Regression" instead a noun "Decline".
Regression
Regression noun - The act or an instance of going back to an earlier and lower level especially of intelligence or behavior.
Usage example: the regression to really childish behavior that boys often undergo when put in large groups
Decline is a synonym for regression in slipping back topic. You can use "Decline" instead a noun "Regression".
Mutual synonyms
Cite this Source
Regression and Decline. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/decline/regression
Decline & Regression. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/decline/regression>.
Regression or Decline. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/decline/regression.
Google Ngram Viewer shows how "decline" and "regression" have occurred on timeline