Area and Upper balcony

Area noun - A part or portion having no fixed boundaries.

Upper balcony and area are semantically related. In some cases you can replace phrase "Upper balcony" with "Area", this terms are similar.

Upper balcony noun - Rearmost or uppermost area in the balcony containing the least expensive seats.

Area and upper balcony are semantically related. You can use "Area" instead a noun phrase "Upper balcony".