Nouns denoting natural objects (not man-made)

A

Aar
Aare
Aare River
Abila
Abukir
Abukir Bay
Abyla
abysm
abyss
abyssal zone
acclivity
Acheron
achondrite
acicula
Aconcagua
Adam's Peak
Adams
Adige
Adirondack Mountains
Adirondacks
adjunct
Admiralty Range
Adriatic
Adriatic Sea
Aegean
Aegean Sea
Aegospotami
Aegospotamos
aerie
aerolite
aery
affluent
Africa
agent
air bubble
airborne transmission
Aire
Aire River
Alabama
Alabama River
Alaska Peninsula
Alaska Range
Aldebaran
Algol
Alleghenies
Allegheny
Allegheny Mountains
Allegheny River
alluvial deposit
alluvial flat
alluvial plain
alluvial sediment
alluvion
alluvium
alp
Alpha Centauri
Alpha Crucis
Alpha Geminorum
Alpha Orionis
alpha particle
Alpine glacier
Alpine type of glacier
Alps
Altai Mountains
Altair
Altay Mountains
altocumulus
altocumulus cloud
altostratus
altostratus cloud
Amazon
Amazon River
America
American Falls
ammonite
ammonoid
Amur
Amur River
Anapurna
Ancohuma
Andaman Sea
Andes
Andromeda
Angara
Angara River
Angel
Angel Falls
anion
Annapurna
Antarctic continent
Antarctic Ocean
Antarctic Peninsula
Antarctica
Antares
anthill
antibaryon
antielectron
antilepton
antimeson
antimuon
antineutrino
antineutron
antiparticle
antiproton
antiquark
antitauon
Antlia
Apalachicola
Apalachicola River
Apennines
aperture
Apollo asteroid
Appalachian Mountains
Appalachians
Apus
Aquarius
aquifer
Aquila
Ara
Arabian Gulf
Arabian Sea
Arafura Sea
Araguaia
Araguaia River
Araguaya
Araguaya River
Aral Sea
Ararat
Aras
Arauca
Araxes
archeological remains
archipelago
Arctic Ocean
Arcturus
arete
Argo
Argun
Argun River
Aries
Aristarchus
Arkansas
Arkansas River
Arno
Arno River
arroyo
ascent
Asia
asterism
asteroid
Asterope
asthenosphere
Atacama Trench
Atlantic
Atlantic Coast
Atlantic Ocean
Atlas Mountains
atmosphere
atoll
Auriga
Australia
Australian Alps
Avon

B

b-meson
backwater
badlands
Baffin Bay
Baikal
Baja California
Balaton
Balkan Mountain Range
Balkan Mountains
Balkans
Baltic
Baltic Sea
bank
bar
barbecue pit
Barents Sea
barrier
barrier island
barrier reef
baryon
base
basin
bathyal district
bathyal zone
bay
Bay of Bengal
Bay of Biscay
Bay of Campeche
Bay of Fundy
Bay of Naples
Bay of Ob
Baykal
bayou
beach
beachfront
Beaufort Sea
beauty quark
bed
bedrock
beehive
belay
belt
ben
bench
berg
Bering Sea
Bering Strait
Berkshire Hills
Berkshires
berm
Beta Centauri
Beta Crucis
Beta Orionis
beta particle
Betelgeuse
Big Dipper
Big Sioux River
Bighorn
Bighorn River
bight
Bight of Benin
bilestone
billabong
binary
binary star
biohazard
biological agent
bird nest
bird's nest
birdnest
Biscayne Bay
Bismarck Sea
bit
black body
Black Forest
Black Hills
black hole
Black Sea
blackbody
bladder stone
blade
blanket
blood-brain barrier
blue
blue air
Blue Nile
Blue Ridge
Blue Ridge Mountains
blue sky
bluff
Bo Hai
Bodensee
body
body of water
bog
bolt-hole
bonanza
Bonete
Bootes
borrow pit
boson
Bosporus
bottom
bottom quark
bottomland
Bougainville Trench
boulder
bowlder
brae
Brahmaputra
Brahmaputra River
branch
branched chain
Brazos
Brazos River
breach
break
Brenner Pass
brickbat
briny
Bristol Channel
brook
brooklet
bubble
buffalo chip
building block
bullet hole
burrow
butte
Buzzards Bay

C

Cachi
Caelum
calculus
caldera
Callisto
Caloosahatchee
Caloosahatchee River
Cam
Cam River
camber
Cambrian Mountains
Canadian
Canadian Falls
Canadian River
canal
Canandaigua Lake
Cancer
cancer body
Canicula
Canis Major
Canis Minor
canon
Canopus
cant
Cantabrian Mountains
Canton River
canyon
canyonside
cap
cape
Cape Canaveral
Cape Cod Bay
Cape Fear River
Cape Kennedy
Cape Sable
Cape Trafalgar
Cape York
Cape York Peninsula
Capella
Capricorn
Capricornus
Caribbean
Caribbean Sea
Carina
Carlsbad Caverns
Carpathian Mountains
Carpathians
Carpentaria
carpet
cascade
Cascade Mountains
Cascade Range
Cascades
Caspian
Caspian Sea
Cassiopeia
Castor
cataract
Cataract Canyon
catch
cation
Catskill Mountains
Catskills
Caucasus
Caucasus Mountains
cave
cavern
cavity
cay
Cayuga Lake
celestial body
cellular inclusion
Centaur
Centaurus
Cepheus
Ceres
Cetus
Chad
chain
chain of mountains
Chamaeleon
Chameleon
champaign
Champlain
Chang
Chang Jiang
Changjiang
Changtzu
channel
Chao Phraya
chap
Chari
Chari River
Charioteer
Charles
Charles River
Charles's Wain
charm quark
chasm
Chattahoochee
Chattahoochee River
chemical chain
Chesapeake Bay
Chimborazo
chink
chip
Chiron
chondrite
chondrule
chromosphere
Chu Kiang
chuckhole
Chukchi Peninsula
Chukchi Sea
Cimarron
Cimarron River
cinder
Circinus
cirque
cirrocumulus
cirrocumulus cloud
cirrostratus
cirrostratus cloud
cirrus
cirrus cloud
clast
clastic rock
cleft
cliff
climb
Clinch River
clinker
closed chain
closed universe
cloud
cloud bank
Clyde
coal
coast
Coast Mountains
Coast Range
coastal plain
coastland
Cocytus
Coeur d'Alene Lake
coffee grounds
col
collector
collision course
Colorado
Colorado Plateau
Colorado River
Columba
Columbia
Columbia River
coma
Coma Berenices
comet
commemorative
common fault
Communism Peak
concretion
condensation trail
confluent
Congo
Congo River
Connecticut
Connecticut River
consolidation
Constance
constellation
continent
continental glacier
continental shelf
continental slope
contrail
Cook Strait
Coosa
Coosa River
Copernicus
coprolite
coprolith
coral reef
Coral Sea
core
corner
Corona Borealis
Coropuna
corrie
Corvus
cosmic string
cosmos
couple
course
cove
cover
covering
cow chip
cow dung
Crab Nebula
crack
crag
Crane
cranny
crater
craton
creation
creek
creek bed
crevasse
crevice
Crocodile River
Cross-Florida Waterway
crossing
Crow
crust
crustal plate
Crux
Crux Australis
crystal
crystallite
crystallization
cultivated land
Cumberland
Cumberland Gap
Cumberland Mountains
Cumberland Plateau
Cumberland River
cumulonimbus
cumulonimbus cloud
cumulus
cumulus cloud
Cuquenan
Cuquenan Falls
curtain
cutting
cwm
Cygnus
cystolith

D

dale
Danau
dander
dandruff
Danube
Danube River
Dapsang
Darling
Darling River
Daryacheh-ye Orumiyeh
Davy Jones
Davy Jones's locker
daystar
Dead Sea
declension
declination
decline
declivity
deep
defile
Deimos
Delaware
Delaware Bay
Delaware River
dell
Delphinus
delta
delta ray
Demerara
Denali
Denali Fault
Deneb
Denebola
deposit
depression
descent
desideratum
Detroit River
deuteron
Dhaulagiri
diapir
diffuse nebula
dingle
dipole
dipole molecule
Dipper
direct transmission
discard
distributary
ditch
divot
Dnieper
Dnieper River
dog do
dog shit
Dog Star
dog turd
doggy do
Dolomite Alps
Don
Don River
Donner Pass
Dorado
double star
Dove
down
down quark
downhill

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