Keep
Keep noun - The act or activity of keeping something in an existing and usually satisfactory condition.
Prolongation and keep are semantically related. In some cases you can use "Prolongation" instead a noun "Keep".
Prolongation
Prolongation noun - The act of making longer.
Keep and prolongation are semantically related. Sometimes you can use "Keep" instead a noun "Prolongation".
Mutual synonyms
Cite this Source
Prolongation and Keep. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/keep/prolongation
Keep & Prolongation. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/keep/prolongation>.
Prolongation or Keep. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/keep/prolongation.
Google Ngram Viewer shows how "keep" and "prolongation" have occurred on timeline