Bergs refer to large masses of ice that float on water such as icebergs. Some synonyms for bergs include floe, ice-floe, ice-field, and pack ice. Floe is a flat sheet of floating ice, while ice-floe refers to a detached piece of ice larger than a cake but smaller than an ice field. Ice field, on the other hand, refers to an expanse of ice covering a large area. Lastly, pack ice refers to a mass of floating ice carried along by currents or wind. These synonyms are often used interchangeably to describe different types of ice formations, particularly those found in the polar regions.