Concoction
Concoction noun - Something (as a device) created for the first time through the use of the imagination.
Impromptu and concoction are semantically related. In some cases you can use "Impromptu" instead a noun "Concoction".
Impromptu
Impromptu noun - Something that is performed, made, or done without preparation.
Usage example: although five different lines had been written, the best choice turned out to be an impromptu from the tired actor himself
Concoction and impromptu are semantically related. Sometimes you can use "Concoction" instead a noun "Impromptu".
Mutual synonyms
Cite this Source
Impromptu and Concoction. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/concoction/impromptu
Concoction & Impromptu. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/concoction/impromptu>.
Impromptu or Concoction. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/concoction/impromptu.
Google Ngram Viewer shows how "concoction" and "impromptu" have occurred on timeline