"More natant" is a phrase that refers to something that is swimming or floating in water. Synonyms for this term could include "buoyant," "floating," "drifting," "bobbing," or "current-borne." These words denote a sense of movement in water, whether it's by the aid of currents or a lack of denser material to weigh the object down. Each of these words can be used to describe objects or creatures that are able to stay afloat in water, such as buoys, rafts, or even fish. While "more natant" may not be a commonly used phrase, there are plenty of synonyms that can be used to describe the same concept.