When referring to a power department, there are several synonyms that can be used depending on the context. For instance, you can use words like utility, electrical, energy or electricity department to describe a power department. Other synonyms could be power station, generating company, energy supplier, or energy provider. Similarly, you can use terms like electricity board, grid operator, or power grid provider when referencing the department that manages the flow of electricity through power lines. The key is to understand the context and audience to choose the most appropriate synonym that will convey the intended message clearly and accurately.