Cordoning off is a term that is commonly used to refer to the action of isolating or closing off a particular area to prevent people from entering. There are many synonyms for the term 'cordoning off' depending on the context or situation that it is being used in. These synonyms include barricading, sealing off, blocking off, fencing, partitioning, quarantining, and isolating. These synonyms are particularly useful in situations such as crime scenes, construction sites, and disaster areas where the public needs to be kept away from certain areas to ensure their safety or prevent interference with ongoing investigations. In essence, cordoning off serves as a necessary security measure that helps to maintain safety and order in different settings.