Cool
Cool adjective - Free from emotional or mental agitation.
Usage example: in a crisis keep a cool head, even if no one else is
Imperturbable is a synonym for cool in calm topic. In some cases you can use "Imperturbable" instead an adjective "Cool", when it comes to topics like character trait, composed, controlled, equable. popular alternative
Imperturbable
Imperturbable adjective - Not easily panicked or upset.
Usage example: the chef was absolutely imperturbable—even when the kitchen caught on fire
Cool is a synonym for imperturbable in calm topic. You can use "Cool" instead an adjective "Imperturbable", if it concerns topics such as character trait, composed, controlled, self-possessed. popular alternative
Nearby Word: imperturbability
Mutual synonyms
Cite this Source
Imperturbable and Cool. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/cool/imperturbable
Cool & Imperturbable. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/cool/imperturbable>.
Imperturbable or Cool. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/cool/imperturbable.
Google Ngram Viewer shows how "cool" and "imperturbable" have occurred on timeline