Nouns denoting natural objects (not man-made)

a body of water cut off from a larger body by a reef of sand or coral
Irtish River
an Asian river that rises in the Altai Mountains in northern China and flows generally northwest to become a tributary of the Ob River
a narrow ridge of hills
a division of an ocean or a large body of salt water partially enclosed by land
full radiator
a hypothetical object capable of absorbing all the electromagnetic radiation falling on it
a thin layer or stratum of (especially metamorphic) rock
Mesabi Range
a range of hills in northeastern Minnesota where rich iron ore deposits were discovered in 1887
a stony meteor lacking chondrules
Handies Peak
a mountain peak in the San Juan Mountains in southwestern Colorado (14,048 feet high)
black hole
a region of space resulting from the collapse of a star; extremely high gravitational field
sanitary landfill
a low area where waste is buried between layers of earth
Niagara River
a river flowing from Lake Erie into Lake Ontario; forms boundary between Ontario and New York
closed universe
(cosmology) a universe that is spatially closed and in which there is sufficient matter to halt the expansion that began with the big bang; the visible matter is only 10 percent of the matter required for closure but there may be large amounts of dark matter
a level tract of land
Cape Cod Bay
the southern part of Massachusetts Bay
dog shit
fecal droppings from a dog
the brightest star in Virgo
a constellation in the southern hemisphere near Centaurus
Labrador Sea
an arm of the northern Atlantic between Labrador and southern Greenland
a constellation in the northern hemisphere between Cassiopeia and Pegasus; contains the Andromeda galaxy
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