Ad-lib and Impromptu

Ad-lib

Ad-lib adjective - Made or done without previous thought or preparation.
Usage example: not bad for an ad-lib comedy routine

Impromptu is a synonym for ad-lib in prepared topic. In some cases you can use "Impromptu" instead the phrase "Ad-lib" as an adjective or a noun or an adverb, when it comes to topics like improvised, off the cuff, planned, in an improvised manner. popular alternative

Impromptu

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

Ad-lib is a synonym for impromptu in prepared topic. You can use "Ad-lib" instead the word "Impromptu" as an adjective or a noun or an adverb, if it concerns topics such as spontaneous, unrehearsed, planned. popular alternative
Cite this Source
Impromptu and Ad-lib. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/ad-lib/impromptu
Ad-lib & Impromptu. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/ad-lib/impromptu>.
Impromptu or Ad-lib. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/ad-lib/impromptu.