There are a plethora of synonyms that can be utilized to depict the idea of a "second floor". These can be simple adjectives like "upper level" or "top floor", or more intricate expressions such as "mezzanine" or "entresol". Other options include "attic", "loft", "garret" or "upper storey". While the most commonly used phrase for a higher level of a building may be "second floor", there are undoubtedly a range of interchangeable words that can be used to describe the same thing. Depending on the context and style, any of these synonyms can add more depth and creativity to written or spoken language.