Aggression.
To set upon; to attack.
To commit the first act of hostility or offense against; to begin a quarrel or controversy with someone; to make an attack against someone.
Rough activity; fighting or brawling; a fight.
An environment of rough activity
A person who characteristically engages in such activity
active, vigorous and rough, with the possibility of harm
highly competitive
Engage in rough-and-tumble activity