Counterfeit
Counterfeit adjective - Being such in appearance only and made or manufactured with the intention of committing fraud.
Impromptu and counterfeit are semantically related. In some cases you can use "Impromptu" instead an adjective "Counterfeit".
Impromptu
Impromptu adjective - Made or done without previous thought or preparation.
Counterfeit and impromptu are semantically related. Sometimes you can use "Counterfeit" instead an adjective "Impromptu".
Cite this Source
Impromptu and Counterfeit. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/counterfeit/impromptu
Counterfeit & Impromptu. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/counterfeit/impromptu>.
Impromptu or Counterfeit. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/counterfeit/impromptu.
Google Ngram Viewer shows how "counterfeit" and "impromptu" have occurred on timeline