• to bring an action, to institute an action
• to go into action, to make a push, to mount an offensive
• to bring an action, to institute an action
• to bring a suit against sy, to bring an action against sy
• to go to war against sy, to make war on sy
• to proceed against sy, to take action against sy
• actuating, motive, starter, starter motor
• getting away, impulse, inducement
• ground, impulse, incitement, inducement, moment, motion, motivation, motive, reason, score
• actuator, crank, starting-lever