Cool
Placid
Placid adjective - Free from emotional or mental agitation.
Usage example: an exceptionally placid mother who was rarely upset by her six children
Cool is a synonym for placid in calm topic. Sometimes you can use "Cool" instead an adjective "Placid", if it concerns topics such as even-tempered.
Mutual synonyms
Cite this Source
Placid and Cool. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/cool/placid
Cool & Placid. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/cool/placid>.
Placid or Cool. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/cool/placid.
Google Ngram Viewer shows how "cool" and "placid" have occurred on timeline