7-10 uniform a particular type of clothing worn by all the members of a group or organization such as the police, the army etc

SEIZE---to take hold of something suddenly and violently SYN grab:

PROTEST---to come together to publicly express disapproval or opposition to something

MOUNT---to plan, organize, and begin an event or a course of action

MASS--involving or intended for a very large number of people:

DEMONSTRATION--an event at which a large group of people meet to protest or to support something in public → protest

CORDON---a line of police officers, soldiers, or vehicles that is put around an area to stop people going there