Decline
Decline noun - A gradual sinking and wasting away of mind or body.
Retardation and decline are semantically related. In some cases you can use "Retardation" instead a noun "Decline".
Retardation
Retardation noun - A usually gradual decrease in the pace or level of activity of something.
Usage example: scientists discovered that they could achieve the retardation of light if they shined it through a variety of substances
Decline and retardation are semantically related. Sometimes you can use "Decline" instead a noun "Retardation".
Cite this Source
Retardation and Decline. (2016). Retrieved 2026, July 31, from https://thesaurus.plus/related/decline/retardation
Decline & Retardation. N.p., 2016. Web. 31 Jul. 2026. <https://thesaurus.plus/related/decline/retardation>.
Retardation or Decline. 2016. Accessed July 31, 2026. https://thesaurus.plus/related/decline/retardation.
Google Ngram Viewer shows how "decline" and "retardation" have occurred on timeline