Nouns denoting natural objects (not man-made)
- break
- (geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
- Lake Albert Nyanza
- a shallow lake on the border between Uganda and Congo in the Great Rift Valley
- Solway Firth
- a large firth on the west coast of Britain between England and Scotland
- bank
- sloping land (especially the slope beside a body of water)
- Kodiak Island
- an island off southern Alaska in the Gulf of Alaska; site of the first European settlement in the area which was founded by the Russians in 1784
- sanitary landfill
- a low area where waste is buried between layers of earth
- Caspian Sea
- a large saltwater lake between Iran and Russia fed by the Volga River; the largest inland body of water in the world
- antiquark
- the antiparticle of a quark
- Omega Centauri
- a global cluster in the constellation Centaurus
- Delaware River
- a river that rises in the Catskills in southeastern New York and flows southward along the border of Pennsylvania with New York and New Jersey to northern Delaware where it empties into Delaware Bay
- open chain
- a chain of atoms in a molecule whose ends are not joined to form a ring
- Aquarius
- a zodiacal constellation in the southern hemisphere; between Capricornus and Pisces
- anthill
- a mound of earth made by ants as they dig their nest
- drumlin
- a mound of glacial drift
- stub
- a small piece
- Antarctic Ocean
- the southern waters surrounding Antarctica
- Deimos
- the outer of two small satellites of Mars
- elevation
- a raised or elevated geological formation
- tarn
- a mountain lake (especially one formed by glaciers)
- charm quark
- a quark with an electric charge of +2/3 and a mass 2900 times that of an electron and a charm of +1
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