Cool
Mutual synonyms
Cite this Source
Heedless and Cool. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/cool/heedless
Cool & Heedless. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/cool/heedless>.
Heedless or Cool. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/cool/heedless.
Google Ngram Viewer shows how "cool" and "heedless" have occurred on timeline