Stations and Tubes

Stations noun - (Roman Catholic Church) a devotion consisting of fourteen prayers said before a series of fourteen pictures or carvings representing successive incidents during Jesus' passage from Pilate's house to his crucifixion at Calvary.

Tubes and stations are semantically related. In some cases you can use "Tubes" instead a noun "Stations".

Stations and tubes are semantically related. Sometimes you can use "Stations" instead a noun "Tubes".