Premier
Premier adjective - Coming before all others in time or order.
Usage example: a space shuttle on its premier voyage
Primary is a synonym for premier in leading topic. In some cases you can use "Primary" instead the word "Premier" as an adjective or a noun, when it comes to topics like important, chief.
Mutual synonyms
Cite this Source
Primary and Premier. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/premier/primary
Premier & Primary. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/premier/primary>.
Primary or Premier. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/premier/primary.
Google Ngram Viewer shows how "premier" and "primary" have occurred on timeline