Nouns denoting natural objects (not man-made)
- Inland Sea
- an arm of the Pacific Ocean in southern Japan; surrounded by the islands of Honshu and Shikoku and Kyushu and linked to the Sea of Japan by a narrow channel; the chief port is Hiroshima
- Aconcagua
- the highest mountain in the western hemisphere; located in the Andes in western Argentina (22,834 feet high)
- Pisces
- a large faint zodiacal constellation; between Aquarius and Aries
- pit
- a sizeable hole (usually in the ground)
- Colorado River
- a river in Texas; flows southeast into the Gulf of Mexico
- Galway Bay
- a bay of the North Atlantic on the west coast of Ireland
- Gulf of Oman
- an arm of the Arabian Sea connecting it with the Persian Gulf
- Forth River
- a river in southern Scotland that flows eastward to the Firth of Forth
- urinary calculus
- a calculus formed in the kidney
- Lyra
- a small constellation in the northern hemisphere near Cygnus and Draco; contains the star Vega
- hollow
- a depression hollowed out of solid matter
- sky
- the atmosphere and outer space as viewed from the earth
- lowland
- low level country
- Danube River
- the 2nd longest European river (after the Volga); flows from southwestern Germany to the Black Sea
- fragment
- a piece broken off or cut off of something else
- Clyde
- a river in western Scotland that flows from the southern uplands into the Firth of Clyde; navigable by oceangoing vessels as far as Glasgow
- fire pit
- a pit whose floor is incandescent lava
- base
- the bottom or lowest part
- rock
- a lump or mass of hard consolidated mineral matter
- relict
- geological feature that is a remnant of a pre-existing formation after other parts have disappeared
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