Nouns denoting natural objects (not man-made)
- polder
- low-lying land that has been reclaimed and is protected by dikes (especially in the Netherlands)
- catch
- anything that is caught (especially if it is worth catching)
- collector
- a crater that has collected cosmic material hitting the earth
- comet
- (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit
- unit cell
- the smallest group of atoms or molecules whose repetition at regular intervals in three dimensions produces the lattices of a crystal
- Cape York
- the northern tip of Cape York Peninsula at the Torres Strait; the northernmost point of the Australian mainland
- ridge
- a long narrow natural elevation on the floor of the ocean
- lough
- a long narrow (nearly landlocked) cove in Ireland
- mid-water
- the water that is well below the surface but also well above the bottom
- valence electron
- an electron in the outer shell of an atom which can combine with other atoms to form molecules
- Mount Hubbard
- a mountain peak in southeastern Alaska that is part of the Coast Range (14,950 feet high)
- Canis Major
- a constellation to the southeast of Orion; contains Sirius
- Ping River
- a river in western Thailand; a major tributary of the Chao Phraya
- Antarctic Ocean
- the southern waters surrounding Antarctica
- waterfall
- a steep descent of the water of a river
- Bering Sea
- part of the North Pacific between Alaska and Siberia; connected to the Arctic Ocean by the Bering Strait
- Mackenzie River
- a Canadian river; flows into the Beaufort Sea
- Arctic Ocean
- ice covered waters surrounding the North Pole; mostly covered with solid ice or with ice floes and icebergs
- burrow
- a hole made by an animal, usually for shelter
- Mount Communism
- the highest mountain peak in the Pamir Mountains; near the Chinese border in northeastern Tajikistan (24,590 feet high)
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