Browse Lemmas

Lemmas found: 67

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current

a steady flow of water, air, or electricity in a particular direction.

Noun natural_feature Level 17
earth

the planet we live on; the third planet from the Sun

Noun natural_feature Level 17
island

A piece of land completely surrounded by water and smaller than a continent.

Noun natural_feature Level 17
river

a naturally flowing body of water, usually freshwater, that moves along a channel from higher to lower elevations and empties into another body of wat...

Noun natural_feature Level 17
temperature

A measure of how hot or cold something is, typically determined by a thermometer and expressed in degrees on a standard scale (such as Celsius or Fahr...

Noun natural_feature Level 17
fire

combustion producing heat and light

Noun natural_feature Level 21
ground

the solid surface of the earth; soil or earth

Noun natural_feature Level 21
sea

A large body of salt water that covers most of the Earth's surface and is partly enclosed by land; one of the principal divisions of the ocean.

Noun natural_feature Level 21
star

a luminous celestial body made of plasma that generates energy through nuclear fusion and appears as a point of light in the night sky; any such objec...

Noun natural_feature Level 21
surface

the outside part or uppermost layer of something; the top of a body of water or land.

Noun natural_feature Level 21
bank

the land alongside or sloping down to a river or lake

Noun natural_feature Level 28
beach

A shore of a body of water, especially a sandy or pebbly area by the sea or a lake where people can walk, sunbathe, or swim.

Noun natural_feature Level 28
cloud

A visible mass of tiny water droplets or ice crystals suspended in the atmosphere, typically forming various shapes and often producing precipitation.

Noun natural_feature Level 28
coast

The land along the edge of the sea; the coastline or shore.

Noun natural_feature Level 28
desert

a large area of land that receives very little precipitation and has sparse vegetation, typically characterized by sand or rock and extreme temperatur...

Noun natural_feature Level 28
flame

a hot glowing body of burning gas

Noun natural_feature Level 28
harbor

a sheltered body of water where ships may anchor safely.

Noun natural_feature Level 28
hill

a naturally raised area of land, smaller than a mountain, often with a rounded summit

Noun natural_feature Level 28
hole

a hollow place in a solid surface.

Noun natural_feature Level 28
ice

Frozen water; a solid form of water produced when temperature falls below 0°C (32°F), often appearing as clear or opaque solid, used for cooling or fo...

Noun natural_feature Level 28
lake

a large body of fresh or salt water surrounded by land

Noun natural_feature Level 28
mist

a cloud of tiny water droplets in the air

Noun natural_feature Level 28
moon

A natural satellite orbiting a planet, such as Earth's moon.

Noun natural_feature Level 28
mountain

a large natural elevation of the Earth's surface rising abruptly from the surrounding level; a large steep hill, usually higher and steeper than a hil...

Noun natural_feature Level 28
path

a way or track laid down for walking or made by continual treading

Noun natural_feature Level 28
planet

a celestial body moving in an elliptical orbit around a star; the Earth.

Noun natural_feature Level 28
rain

Water that falls from clouds in drops; precipitation in the form of liquid water.

Noun natural_feature Level 28
sky

The region of the atmosphere and outer space that appears as a dome over the Earth, seen as the area where clouds, the sun, moon, and stars appear.

Noun natural_feature Level 28
slope

a surface with one end higher than the other

Noun natural_feature Level 28
snow

Frozen crystalline precipitation that falls from clouds as white flakes, forming a layer on the ground when temperatures are low.

Noun natural_feature Level 28
stream

a small, narrow river

Noun natural_feature Level 28
sun

The star at the center of the Solar System that provides light and heat to Earth and around which the planets orbit.

Noun natural_feature Level 28
thunder

the loud noise following lightning

Noun natural_feature Level 28
valley

a low area of land between hills or mountains, often with a river or stream running through it

Noun natural_feature Level 28
wave

a ridge of water moving across the surface

Noun natural_feature Level 28
wind

a natural movement of air, especially a perceptible breeze or a flow of air produced by atmospheric pressure differences

Noun natural_feature Level 28
coral reef

a ridge of coral built up in warm shallow sea

Noun natural_feature Level 29
hot spring

a natural spring of warm mineral water

Noun natural_feature Level 29
plot

A small piece of ground, especially one used for a specific purpose.

Noun natural_feature Level 29
riverbed

the bottom of a river channel.

Noun natural_feature Level 29
sand dune

a mound of wind-blown sand

Noun natural_feature Level 29
shooting star

a meteor seen as a streak of light

Noun natural_feature Level 29
cave

a natural underground hollow or chamber in rock, typically large enough for a human to enter

Noun natural_feature Level 43
ocean

A vast body of salt water that covers most of the Earth's surface and is divided into major areas such as the Atlantic, Pacific, Indian, Arctic, and S...

Noun natural_feature Level 43
shore

the land along the edge of a sea, lake, or other large body of water

Noun natural_feature Level 43
storm

a violent weather event characterized by strong winds, often with rain, snow, thunder, or lightning

Noun natural_feature Level 43
track

a rough path or trail, especially one made by repeated passage

Noun natural_feature Level 43
fog

A thick cloud of tiny water droplets suspended in the air near the ground that reduces visibility.

Noun natural_feature Level 45
forecast

a prediction or estimate of future events, especially of weather or economic conditions

Noun natural_feature Level 45
pond

a small body of still water.

Noun natural_feature Level 45