Main line and Well-to-do

Main line noun - The principal route of a transportation system.

Well-to-do and main line are semantically related. in successful topic. In some cases you can use "Well-to-do" instead an adjective phrase "Main line".

Well-to-do adjective - Having goods, property, or money in abundance.

Main line and well-to-do are semantically related. Sometimes you can replace phrase "Main line" with "Well-to-do", this phrases are similar.