Nouns denoting natural objects (not man-made)

crag
a steep rugged rock or cliff
 
blue sky
the sky as viewed during daylight
 
Pacific Coast
a coast of the Pacific Ocean
 
neutron star
a star that has collapsed under its own gravity; it is composed of neutrons
 
highland
elevated (e.g., mountainous) land
 
satellite
any celestial body orbiting around a planet or star
 
Wisconsin River
a tributary of the Mississippi River in Wisconsin
 
Chao Phraya
a river in Thailand formed by the confluence of the Nan and Ping Rivers; flows southward past Bangkok and empties into the Gulf of Thailand
 
mesosphere
the atmospheric layer between the stratosphere and the thermosphere
 
Red Planet
a small reddish planet that is the 4th from the sun and is periodically visible to the naked eye; minerals rich in iron cover its surface and are responsible for its characteristic color
 
llano
an extensive grassy and nearly treeless plain (especially in Latin America)
 
Alpine type of glacier
a glacier that moves down from a high valley
 
Abukir Bay
a bay on the Mediterranean Sea in northern Egypt
 
Magdalena River
a river that rises in the Andes mountains in southwestern Colombia and flows generally northward to empty into the Caribbean Sea at Barranquilla
 
Loch Achray
a lake in central Scotland
 
strip
a relatively long narrow piece of something
 
arete
a sharp narrow ridge found in rugged mountains
 
Donner Pass
a mountain pass in northeastern California near Lake Tahoe; site where in 1844 some members of an emigrant party survived by eating those who had died
 
Pleiades
a star cluster in the constellation Taurus
 
North Sea
an arm of the North Atlantic between the British Isles and Scandinavia; oil was discovered under the North Sea in 1970
 
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