| English | Russian |
| secondary catchment area | зона вторичного водоудержания |
| secondary rail end batter | смятие вторичное в виде седловины в рельсовом стыке (occurs not directly at the rail end in a rail joint but generally on high speed track where wheels are "launched" over a joint and land on the receiving rail, a discrete distance from the rail end) |
| secondary steel | вторичные стальные конструкции (socrates) |