Course
Main line
Main line noun - The principal route of a transportation system.
Both terms in one sentence
- And of course, all main line twins have alliterative names because, y'know, Alphabetacy.
Source: Blog / Hermione's ABCs
Cite this Source
Main line and Course. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/course/main_line
Course & Main line. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/course/main_line>.
Main line or Course. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/course/main_line.
Google Ngram Viewer shows how "course" and "main line" have occurred on timeline