There are several synonyms for the phrase "second story works" that can be used depending on the context. For example, it could be referred to as upper-level construction, elevated building, or multi-level building. Other synonyms to consider include high-rise construction, mezzanine work, or dual-level construction. These terms can be used to describe buildings that have a second floor or higher, as well as any work that is being completed on those upper levels. Ultimately, the choice of synonym will depend on the specific situation and what sounds most appropriate in context.