Impromptu
Impromptu adjective - Made or done without previous thought or preparation.
Sudden
Sudden adjective - Not expected.
Impromptu and sudden are semantically related in unexpected topic. Sometimes you can use "Impromptu" instead an adjective "Sudden".
Nearby Words: suddenly, suddenness
Mutual synonyms
Related pairs
- impulsive and impromptu
- impulsive and sudden
- involuntary and impromptu
- involuntary and sudden
- abrupt and impromptu
- abrupt and sudden
- impetuous and impromptu
- impetuous and sudden
- rash and impromptu
- rash and sudden
- precipitous and impromptu
- precipitous and sudden
- precipitate and impromptu
- precipitate and sudden
Both words in one sentence
- These can be combined, too, resulting in a gag where the character ends up with several impromptu changes of clothes before the sudden stop at the end.
Source: Gravity Is a Harsh Seamstress
Cite this Source
Sudden and Impromptu. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/impromptu/sudden
Impromptu & Sudden. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/impromptu/sudden>.
Sudden or Impromptu. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/impromptu/sudden.
Google Ngram Viewer shows how "impromptu" and "sudden" have occurred on timeline