Moving staircase and Stairs

Moving staircase noun - A stairway whose steps move continuously on a circulating belt.

Stairs and moving staircase are semantically related. In some cases you can use "Stairs" instead a noun phrase "Moving staircase".

Stairs noun - A flight of stairs or a flight of steps.

Moving staircase and stairs are semantically related. You can use "Moving staircase" instead a noun "Stairs".