First class
First class noun - Mail that includes letters and postcards and packages sealed against inspection.
Selective and first class are semantically related. in excellent topic. In some cases you can use "Selective" instead an adjective phrase "First class".
Selective
Selective adjective - Tending to select carefully.
First class and selective are semantically related. Sometimes you can replace phrase "First class" with "Selective", this terms are similar.
Cite this Source
Selective and First class. (2016). Retrieved 2026, August 11, from https://thesaurus.plus/related/first_class/selective
First class & Selective. N.p., 2016. Web. 11 Aug. 2026. <https://thesaurus.plus/related/first_class/selective>.
Selective or First class. 2016. Accessed August 11, 2026. https://thesaurus.plus/related/first_class/selective.
Google Ngram Viewer shows how "first class" and "selective" have occurred on timeline