Retard
Retard noun - A person of subnormal intelligence.
Retardation and retard are semantically related. In some cases you can use "Retardation" instead a noun "Retard".
Retardation
Retardation noun - A usually gradual decrease in the pace or level of activity of something.
Retard and retardation are semantically related. Sometimes you can use "Retard" instead a noun "Retardation".
Cite this Source
Retardation and Retard. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/retard/retardation
Retard & Retardation. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/retard/retardation>.
Retardation or Retard. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/retard/retardation.
Google Ngram Viewer shows how "retard" and "retardation" have occurred on timeline