The term POWERFUL CURRENT can be described by two crossword solutions: WHIRLPOOL (9 letters) and RIP (3 letters). A WHIRLPOOL is a powerful swirling body of water created by the meeting of opposing currents. It is often found in rivers, oceans, and other bodies of water. A RIP is a powerful current of water that flows away from the shoreline. It is usually caused by strong winds or tides and can be dangerous to swimmers.