Adolescence /ˌæd

skyscraper /ˈskaɪˌskreɪ.pə r / /-pɚ/ noun [ C ]
a very tall modern building, usually in a city
staircase /ˈsteə.keɪs/ /ˈster-/ noun [ C ]
a set of stairs inside a building usually with a bar fixed on the wall or onto vertical poles at the side for you to hold on to
She descended the sweeping (= long and wide) staircase into the crowd of photographers and journalists.
steel /stiːl/ noun [ U ]
a strong metal which is a mixture of iron and carbon, and which is used for making things which need a strong structure, especially vehicles and buildings
steel girders/rods/struts a steel helmet a steel-plated army truck
storage /ˈstɔː.rɪdʒ/ /ˈstɔːr.ɪdʒ/ noun [ U ]
1. the putting and keeping of things in a special place for use in the future
We've had to build some cupboards to give us more storage space .
2. in storage
If things such as furniture are in storage, they are being kept safe in a special building while they are not needed.