Nouns denoting natural objects (not man-made)

ore bed
a stratum of ore
 
rabbit hole
a hole in the ground as a nest made by wild rabbits
 
river boulder
a boulder that has been carried by a river to a place remote from its place of origin
 
Ping River
a river in western Thailand; a major tributary of the Chao Phraya
 
Chiron
an asteroid discovered in 1977; it is unique in having an orbit lying mainly between the orbits of Saturn and Uranus
 
mare nostrum
(our sea) the Mediterranean to the ancient Romans
 
Allegheny Mountains
the western part of the Appalachian Mountains; extending from northern Pennsylvania to southwestern Virginia
 
Cumberland River
a river that rises in southeastern Kentucky and flows westward through northern Tennessee to become a tributary of the Ohio River in southwestern Kentucky
 
Cataract Canyon
a tributary of the Grand Canyon
 
Congo River
a major African river (one of the world's longest); flows through Congo into the South Atlantic
 
Tevere
a river of central Italy; flows through Rome to the Tyrrhenian Sea
 
Adriatic Sea
an arm of the Mediterranean between Slovenia and Croatia and Montenegro and Albania on the east and Italy on the west
 
micrometeor
a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere
 
Niagara Falls
waterfall in Canada is the Horseshoe Falls; in the United States it is the American Falls
 
Cumberland Mountains
the southwestern part of the Appalachians
 
hole
an opening into or through something
 
relaxer
any agent that produces relaxation
 
Lake Canandaigua
a glacial lake in central New York; one of the Finger Lakes
 
twinkler
an object that emits or reflects light in an intermittent flickering manner
 
Loire River
the longest French river; rises in the Massif Central and flows north and west to the Atlantic Ocean
 
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