The term 'It Comes in Waves' can be summarized by the crossword solution 'TIDE, ' which is a four-letter word. The term 'TIDE' is used to refer to the regular rise and fall of the ocean's surface caused by the gravitational pull of the moon and sun. Tides are an important part of the ocean's ecosystem, as they bring in nutrients and oxygen to coastal areas, and help to regulate the temperature of the water.