stair·case 
/ˈsteɚˌkeɪs/ noun
plural stair·cas·es /ˈsteɚˌkeɪs/ noun [count] : a set of stairs and its supporting structures
▪ a wooden staircase — see also moving staircase, spiral staircase
▪ a wooden staircase — see also moving staircase, spiral staircase
