A building complex is a term that describes a group of buildings that are interconnected or share a common purpose. There are several synonyms for this term, including construction, compound, edifice, facility, structure, and development. Each of these words can be used to describe the physical structures that make up a building complex. For instance, the word 'structure' can refer to the foundation, framework, or overall design of the complex, while 'edifice' emphasizes the impressive or imposing nature of the buildings. Depending on the context, any of these synonyms can convey a slightly different nuance or connotation, but they all capture the idea of a collection of buildings that form a cohesive whole.