body_of_water
1. [ noun ] (geography) the part of the earth's surface covered with water (such as a river or lake or ocean)
Synonyms: water
Examples:

"they invaded our territorial waters" "they were sitting by the water's edge"

Related terms: object entity thing sea stream ocean bay lake cove channel waterfall gulf estuary high_sea waterway pool territorial_waters mid-water deep main offing flowage channel shoal drink backwater ford seven_seas sound territorial_water surface hydrosphere water river ocean lake