When it comes to synonyms for "orderly-room", there are several options that can be used to refer to a space that is utilitarian and organized. Some possible alternatives include the terms command center, nerve center, or control room. These phrases all convey the idea of a central location from which important activities are managed or coordinated. Other possible synonyms for "orderly-room" might include words like headquarters, operations center, or even war room, depending on the context. Ultimately, the choice of synonym will depend on the specific usage context and the desired connotations or implications that the writer or speaker wishes to convey.