Another word for staircase

As she rounded the curve in the staircase, the room became silent.

He went down that staircase and out into the yard.

A broad staircase led straight up from the entry, and to the right he saw a closed door.

He couldn't sense the Other and paused at the foot of the sweeping, grand staircase leading to the second floor.

A fine carved staircase, however, still exists in the main chapel.