Nouns denoting natural objects (not man-made)

quark
(physics) hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavors of quarks (and their antiquarks), which come in pairs; each has an electric charge of +2/3 or -1/3
 
Gulf of Aegina
a gulf of the Aegean on the southeastern coast of Greece
 
tau-plus particle
an antilepton of very great mass
 
coprolite
fossil excrement; petrified dung
 
Sea of Okhotsk
an arm of the Pacific to the east of Asia
 
trough
a narrow depression (as in the earth or between ocean waves or in the ocean bed)
 
Dolomite Alps
an eastern range of the Alps in northeastern Italy famous for their dolomitic limestone
 
stone
a lump or mass of hard consolidated mineral matter
 
seamount
an underwater mountain rising above the ocean floor
 
Serpens
a constellation in the equatorial region of the northern hemisphere near Ophiuchus and Corona Borealis
 
Rappahannock River
a river that flows across eastern Virginia into the Tidewater region
 
Strait of Messina
the strait separating Sicily from the tip of Italy
 
stratosphere
the atmospheric layer between the troposphere and the mesosphere
 
Victoria Nyanza
the largest lake in Africa and the 2nd largest fresh water lake in the world; a headwaters reservoir for the Nile River
 
Galan
a mountain peak in the Andes in Argentina (21,654 feet high)
 
sound
a large ocean inlet or deep bay
 
Tevere
a river of central Italy; flows through Rome to the Tyrrhenian Sea
 
Lyra
a small constellation in the northern hemisphere near Cygnus and Draco; contains the star Vega
 
Lake Baikal
the largest freshwater lake in Asia or Europe and the deepest lake in the world
 
Taurus
a zodiacal constellation in the northern hemisphere near Orion; between Aries and Gemini
 
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