The term 'experiment room' could be substituted with several synonyms that convey a similar meaning. For instance, the word 'laboratory' is often used as a synonym for experiment room. Similarly, 'research room' and 'test chamber' also serve as credible alternatives. Another synonym for the experiment room could be the 'trial area' that is typically used for running controlled trials. The term 'observation deck' can also be used to suggest a space where scientists can observe an experiment in progress. Some might even call it a 'workshop' or a 'studio' where experiments are conducted. In conclusion, different words can replace the term 'experiment room'. However, the context and the purpose of the room will determine which synonym is best suited.