staircase
stair-case
noun
A structure consisting of a series of steps connecting different floors or levels of a building.
"She ascended the elegant staircase to the first floor."
Thesaurus
Synonyms: stairway
stair-case
A structure consisting of a series of steps connecting different floors or levels of a building.
"She ascended the elegant staircase to the first floor."
Synonyms: stairway