rip-tide

n tide causing strong currents and rough water （造成巨浪和急流的）大潮.

ringer, ringleader, ringlet, ringmaster, ringside, ringworm, rink, rinse, Rio de Janneiro, riot, riot police, riot shield, riotous, riotously, riotousness, rip, rip-cord, rip-off, rip-roaring, rip-saw, riparian, ripe, ripen, ripeness, riposte, ripple, rise, rise superior to, riser, risible, rising, rising damp, rising fives, risk, riskily, riskiness, risky, risotto, risque, rissole,