First-class
First-class adjective - Of the very best kind.
Usage example: a first-class production of a classic American musical
Prime
Prime adjective - Of the very best kind.
Usage example: owns a thousand acres of prime farmland
First-class is a synonym for prime in good topic. You can use "First-class" instead an adjective "Prime", if it concerns topics such as best, better, top-quality.
Mutual synonyms
Cite this Source
Prime and First-class. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/first-class/prime
First-class & Prime. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/first-class/prime>.
Prime or First-class. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/first-class/prime.