Swims in is a phrase that describes the action of being inside and moving around in water. There are several words that can be used as synonyms for "swims in". Some of the most common synonyms for this phrase include "dives into", "floats in", "wades in", "immerses in", "submerges in", and "plunges into". These words can be used to provide a more descriptive and varied language when writing about swimming or water-related activities. Each synonym conjures up a slightly different mental image, so selecting the most appropriate word depends on the specific context in which it is being used.