The crossword solution for the term SUPPORT FOR RAILWAY LINES is SLEEPER, which is a seven-letter word. A SLEEPER is a wooden or concrete beam that is laid beneath the rails of a railway track to provide support and stability. Sleepers are usually spaced at regular intervals along the track, and they help to keep the track in place and prevent it from shifting. They also absorb the shock of passing trains, helping to reduce wear and tear on the track.