Nouns denoting natural objects (not man-made)
- ion
- a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons
- shortener
- any agent that shortens
- American Falls
- a part of Niagara Falls in western New York (north of Buffalo)
- overburden
- the surface soil that must be moved away to get at coal seams and mineral deposits
- Mozambique Channel
- an arm of the Indian Ocean between Madagascar and southeastern Africa
- 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
- ribbon
- any long object resembling a thin line
- Grand Canyon
- the enormous gorge of the Colorado River in northern Arizona
- Trapezium
- a multiple star in the constellation of Orion
- Spica
- the brightest star in Virgo
- Yalu River
- river in eastern Asia; rises in North Korea and flows southwest to Korea Bay (forming part of the border between North Korea and China)
- antitauon
- an antilepton of very great mass
- Republican River
- a tributary of the Kansas River that flows from eastern Colorado eastward through Nebraska and Kansas
- Taconic Mountains
- a range of the Appalachian Mountains along the eastern border of New York with Connecticut, Massachusetts, and Vermont
- antineutrino
- the antiparticle of a neutrino
- New River
- a river in the southeastern United States that flows northward from North Carolina to West Virginia where it empties into the Kanawha River
- 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
- Tyan Shan
- a major mountain range of central Asia; extends 1,500 miles
- necessary
- anything indispensable
- loch
- a long narrow inlet of the sea in Scotland (especially when it is nearly landlocked)
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