Nouns denoting natural objects (not man-made)

Windward Passage
a channel between eastern Cuba and western Haiti that connects the Atlantic Ocean with the Caribbean Sea
 
Neosho River
a river that rises in eastern Kansas and flows eastward into Oklahoma to become a tributary of the Arkansas River
 
Ouse River
a river in northeastern England that flows generally southeastward to join the Trent River and form the Humber
 
gulf
a deep wide chasm
 
chain of mountains
a series of hills or mountains
 
polar glacier
a glacier near the Arctic or Antarctic poles
 
nebula
an immense cloud of gas (mainly hydrogen) and dust in interstellar space
 
Amazon River
a major South American river; arises in the Andes and flows eastward into the South Atlantic; the world's 2nd longest river (4000 miles)
 
Arno River
a river in central Italy rising in the Apennines and flowing through Florence and Pisa to the Ligurian Sea
 
Asia
the largest continent with 60% of the earth's population; it is joined to Europe on the west to form Eurasia; it is the site of some of the world's earliest civilizations
 
James River
a river in Virginia that flows east into Chesapeake Bay at Hampton Roads
 
snowfield
a permanent wide expanse of snow
 
Lepus
a constellation in the southern hemisphere near Orion and Columba
 
Saturn
a giant planet that is surrounded by three planar concentric rings of ice particles; the 6th planet from the sun
 
Weddell Sea
an arm of the south Atlantic in Antarctica to the east of the Antarctic Peninsula
 
tent
a web that resembles a tent or carpet
 
Penobscot Bay
an inlet of the Atlantic in eastern Maine
 
Allegheny Mountains
the western part of the Appalachian Mountains; extending from northern Pennsylvania to southwestern Virginia
 
Solent
a strait of the English Channel between the coast of Hampshire and the Isle of Wight
 
recess
an arm off of a larger body of water (often between rocky headlands)
 
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