Was trying to figure out the difference between all these types of bodies of water in south Florida. Here's the definition of each, although I would imagine some of the locally named bodies of water are misnomers.
Basin - a region of land where water from rain or snowmelt drains downhill into another body of water, such as a river, lake, or dam
Bay - an area of water bordered by land on three sides.
Bight - a large and often only slightly receding bay, or a bend in any geographical feature.
Cove - a coastal landform. Earth scientists generally use the term to describe a circular or round inlet with a narrow entrance, though colloquially the term is sometimes used to describe any sheltered bay.
Estuary - a semi-enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the open sea
Gulf - a part of a lake or ocean that extends so that it is surrounded by land on three sides, similar to, but larger than a bay.
Harbor - a man-made or naturally occurring body of water where ships are stored or may shelter from the ocean's weather and currents
Inlet - a body of water, usually seawater, which has characteristics of one or more of the following: bay, cove, estuary, firth, fjord, geo, sea loch, or sound.
Lagoon - a body of comparatively shallow salt or brackish water separated from the deeper sea by a shallow or exposed sandbank, coral reef, or similar feature.
Sound - a large sea or ocean inlet larger than a bay, deeper than a bight, wider than a fjord, or it may identify a narrow sea or ocean channel between two bodies of land.