Extempore and Impromptu

Extempore

Extempore adjective - Made or done without previous thought or preparation.
Usage example: after the election both candidates admitted that they had made a number of extempore remarks that they later regretted

Impromptu is a synonym for extempore in prepared topic. In some cases you can use "Impromptu" instead the word "Extempore" as an adjective or an adverb or a noun, when it comes to topics like offhand. informal substitute

Impromptu

Impromptu adjective - Made or done without previous thought or preparation.
Usage example: our dinner guest thanked us with an impromptu song

Extempore is a synonym for impromptu in unrehearsed topic. You can use "Extempore" instead the word "Impromptu" as an adjective or an adverb, if it concerns topics such as prepared, spontaneous. popular alternative
Cite this Source
Impromptu and Extempore. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/extempore/impromptu
Extempore & Impromptu. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/extempore/impromptu>.
Impromptu or Extempore. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/extempore/impromptu.
Google Ngram Viewer shows how "extempore" and "impromptu" have occurred on timeline