1) Access between floors 2) Architectural element 3) Elevator alternative 4) Emergency route 5) Fliers, collectively 6) Flight 7) Flight of stairs 8) Flight of steps 9) Heavenly approach 10) It leads to the upper level 11) Level connector 12) Pedestrian infrastructure 13) Set of steps 14) Stair 15) Staircase 1) Companionway 2) Ghat 3) Ladder 4) Staircase 5) Stairs 6) Stairwell 7) Steps 
• (n.) A flight of stairs or steps; a staircase.
Stair'way` noun A flight of stairs or steps; a staircase. 'A rude and narrow stairway .' Moore. 
[n] - a way of access consisting of a set of steps
staircase noun a way of access (upward and downward) consisting of a set of steps
a passageway from one level, as of a building, to another by a series of stairs; staircase.