bannister, stairway, escalator, ladder, fire escape, flight, steps, landing, handrail, stairs, banister, dumbwaiter, elevator.
There is a back staircase
The note was lying on the table and I brought it out to the landing to read by the light of the staircase
He had stayed too long in the room, it seemed; the little staircase
was, after all, likely to prove of no service.