Impromptu
Impromptu adjective - Made or done without previous thought or preparation.
Soft shell and impromptu are semantically related. In some cases you can use "Soft shell" instead an adjective "Impromptu".
Soft shell
Impromptu and soft shell are semantically related. Sometimes you can use "Impromptu" instead an adjective phrase "Soft shell".
Cite this Source
Soft shell and Impromptu. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/impromptu/soft_shell
Impromptu & Soft shell. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/impromptu/soft_shell>.
Soft shell or Impromptu. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/impromptu/soft_shell.
Google Ngram Viewer shows how "impromptu" and "soft shell" have occurred on timeline