Cool
Cool adjective - Free from emotional or mental agitation.
Usage example: in a crisis keep a cool head, even if no one else is
Tranquil is a synonym for cool in calm topic. In some cases you can use "Tranquil" instead an adjective "Cool", when it comes to topics like composed, controlled, serene. popular alternative
Tranquil
Tranquil adjective - Free from emotional or mental agitation.
Usage example: though she should have been upset, she felt oddly tranquil upon learning that she would not be receiving the scholarship
Cool is a synonym for tranquil in calm topic. You can use "Cool" instead the word "Tranquil" as an adjective or a noun, if it concerns topics such as composed, controlled, quiet. popular alternative
Nearby Word: tranquilly
Mutual synonyms
Both words in one sentence
- Bullet is blue, cool and calm in her choice of actions to the point of heartless, and she often exhibits Tranquil Fury in contrast to Francesca's Unstoppable Rage.
Source: Manga / Trash - Tranquil Fury: She does lose her cool a few times, but Nariko's much more dangerous when she's quiet.Kai Voiced by Lydia Baksh Automatic Crossbows: Her weapon of choice.
Source: Characters / Heavenly Sword - He turned now with a lover's thirst to images of tranquil skies, fresh meadows, cool brooks—an existence of soft and eternal peace.
Cite this Source
Tranquil and Cool. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/cool/tranquil
Cool & Tranquil. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/cool/tranquil>.
Tranquil or Cool. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/cool/tranquil.
Google Ngram Viewer shows how "cool" and "tranquil" have occurred on timeline