Main line
Main line noun - The principal route of a transportation system.
Prime and main line are semantically related. in high-class persons topic. In some cases you can use "Prime" instead a noun phrase "Main line".
Cite this Source
Prime and Main line. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/main_line/prime
Main line & Prime. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/main_line/prime>.
Prime or Main line. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/main_line/prime.
Google Ngram Viewer shows how "main line" and "prime" have occurred on timeline