There are plenty of synonyms for the word "workrooms" depending on the context. If you're talking about a place where employees work, you could use "office," "workspace," or "cubicle." For a more specialized setting like a factory or workshop, "production area," "workshop," and "assembly line" might be more appropriate. If you're looking for a term that specifically implies a creative work environment, "studio," "atelier," or "design lab" could be better choices. In a more general sense, you might also use "workplace," "work area," or "work zone." Ultimately, the choice of synonym depends on the industry, the type of work being done, and the tone of the writing.