Main line
Main line noun - The principal route of a transportation system.
Substantial and main line are semantically related. in successful topic. In some cases you can use "Substantial" instead an adjective phrase "Main line".
Substantial
Substantial adjective - Having great meaning or lasting effect.
Main line and substantial are semantically related. Sometimes you can replace phrase "Main line" with "Substantial", this terms are similar.
Mutual synonyms
Cite this Source
Substantial and Main line. (2016). Retrieved 2026, July 27, from https://thesaurus.plus/related/main_line/substantial
Main line & Substantial. N.p., 2016. Web. 27 Jul. 2026. <https://thesaurus.plus/related/main_line/substantial>.
Substantial or Main line. 2016. Accessed July 27, 2026. https://thesaurus.plus/related/main_line/substantial.
Google Ngram Viewer shows how "main line" and "substantial" have occurred on timeline