Meaning: The area of land drained by a river and its tributaries.

Part of speech: noun

Example: The river basin is rich in biodiversity.

Category: Nature › Geography

Meaning: The ground at the bottom of a river.

Part of speech: noun

Example: Fish swim along the river bed.

Category: Nature › Water

Meaning: The area of land along the bank of a river.

Part of speech: noun

Example: The riverfront park is a popular spot for families.

Category: Nature › Water

Meaning: The land along the side of a river.

Part of speech: noun

Example: They built a house by the riverside.

Category: Nature › Water

Meaning: A small stream of water.

Part of speech: noun

Example: A rivulet flowed through the forest.

Category: Nature › Water

Meaning: A type of fish found in freshwater.

Part of speech: noun

Example: We caught a roach while fishing in the river.

Category: Nature › Fish

Meaning: An animal that has been killed on the road by a vehicle.

Part of speech: noun

Example: We saw roadkill on our drive through the countryside.

Category: Nature › Animals

Meaning: having a coat of mixed color, especially red and white or black and white.

Part of speech: adjective

Example: The horse was a beautiful roan color.

Category: Nature › Animals

Synonyms:

• spotted
• dappled

Antonyms: solid-colored

Meaning: to make a loud, deep sound.

Part of speech: verb

Example: The lion began to roar in the distance.

Category: Nature › Animal Sounds

Synonyms:

• bellow
• thunder

Antonyms:

• whisper
• murmur

Meaning: very loud or intense.

Part of speech: adjective

Example: The roaring fire kept us warm all night.

Category: Nature › Fire

Synonyms:

• thundering
• boisterous

Antonyms:

• quiet
• calm

Meaning: a small bird known for its red breast.

Part of speech: noun

Example: The robin sang beautifully in the morning.

Category: Nature › Birds

Synonyms:

• bird
• songbird

Meaning: a solid mineral material forming part of the surface of the earth.

Part of speech: noun

Example: The rock was too heavy to lift.

Category: Nature › Geology

Synonyms:

• stone
• boulder

Antonyms:

• sand
• dust

Meaning: a garden designed with rocks and alpine plants.

Part of speech: noun

Example: The rock garden was a peaceful retreat.

Category: Nature › Gardening

Synonyms:

• rockery
• stone garden

Meaning: a pool of seawater left in a rock formation after the tide has receded.

Part of speech: noun

Example: The children explored the rock pool at low tide.

Category: Nature › Marine Life

Synonyms:

• tidal pool
• marine pool

Meaning: a garden area with rocks and plants.

Part of speech: noun

Example: The rockery was filled with beautiful flowers.

Category: Nature › Gardening

Synonyms:

• rock garden
• stone garden

Meaning: extremely hard.

Part of speech: adjective

Example: The rock-hard surface was difficult to break.

Category: Nature › Materials

Synonyms:

• solid
• hard

Antonyms:

• soft
• fragile

Meaning: resembling a rock.

Part of speech: adjective

Example: The rock-like structure stood tall in the desert.

Category: Nature › Geology

Synonyms:

• stony
• rocky

Antonyms:

• soft
• smooth

Meaning: full of rocks; uneven or rough.

Part of speech: adjective

Example: The path was rocky and difficult to walk on.

Category: Nature › Geology

Synonyms:

• stony
• rugged

Antonyms:

• smooth
• flat

Meaning: a small mammal with large front teeth, such as a rat or mouse.

Part of speech: noun

Example: The rodent scurried across the floor.

Category: Nature › Animals

Synonyms:

• mouse
• rat

Meaning: a small deer found in Europe and Asia.

Part of speech: noun

Example: The roe deer grazed peacefully in the meadow.

Category: Nature › Animals

Synonyms:

• deer
• animal

Meaning: to disturb or agitate.

Part of speech: verb

Example: The storm began to roil the sea.

Category: Nature › Weather

Synonyms:

• stir
• disturb

Antonyms:

• calm
• settle

Meaning: A garden located on the roof of a building.

Part of speech: noun

Example: The roof garden provides a peaceful escape in the city.

Category: Nature › Gardening

Synonyms: rooftop garden

Meaning: A type of bird in the crow family, known for its distinctive call.

Part of speech: noun

Example: The rook cawed loudly from the tree.

Category: Nature › Birds

Synonyms:

• crow
• raven

Meaning: To settle down or rest, especially for birds.

Part of speech: verb

Example: The birds roost in the trees at night.

Category: Nature › Birds

Synonyms:

• perch
• settle

Meaning: A male chicken, known for its crowing sound.

Part of speech: noun

Example: The rooster crowed at dawn.

Category: Nature › Animals

Synonyms: cock

Meaning: The part of a plant that attaches it to the ground and absorbs nutrients.

Part of speech: noun

Example: The root of the tree is very deep.

Category: Nature › Botany

Synonyms:

• base
• foundation

Antonyms: leaf

Meaning: A type of flowering plant known for its beauty and fragrance.

Part of speech: noun

Example: She received a rose for her birthday.

Category: Nature › Plants

Synonyms:

• flower
• blossom

Meaning: A young rose flower that has not yet bloomed.

Part of speech: noun

Example: The rosebud was still tightly closed.

Category: Nature › Plants

Synonyms: bud

Meaning: To decay or decompose, especially organic matter.

Part of speech: verb

Example: The fruit will rot if left out too long.

Category: Nature › Biology

Synonyms:

• decay
• decompose

Antonyms: preserve

Meaning: A breed of large dog known for its strength and loyalty.

Part of speech: noun

Example: The Rottweiler is often used as a guard dog.

Category: Nature › Animals

Synonyms: dog breed

Meaning: A type of tree known for its bright red berries, often used in folklore.

Part of speech: noun

Example: The rowan tree is considered sacred in some cultures.

Category: Nature › Botany

Synonyms: mountain ash

Meaning: A type of indoor plant known for its large, glossy leaves.

Part of speech: noun

Example: The rubber plant thrives in bright, indirect light.

Category: Nature › Botany

Synonyms: Ficus elastica

Meaning: To disturb the smoothness of something.

Part of speech: verb

Example: The wind ruffled her hair.

Category: Nature › Weather

Synonyms:

• disarrange
• mess up

Meaning: Disturbed or disordered.

Part of speech: adjective

Example: She looked ruffled after the long meeting.

Category: Nature

Synonyms:

• disheveled
• messy

Meaning: Having a rough or uneven surface.

Part of speech: adjective

Example: The rugged mountains were breathtaking.

Category: Nature › Geography

Synonyms:

• rough
• tough

Antonyms:

• smooth
• soft

Meaning: To destroy or severely damage something.

Part of speech: verb

Example: The storm could ruin the crops.

Category: Nature › Weather

Synonyms:

• destroy
• wreck

Antonyms:

• save
• preserve

Meaning: The act of ruining or the state of being ruined.

Part of speech: noun

Example: The ruination of the building was sad to see.

Category: Nature › Weather

Synonyms:

• destruction
• devastation

Meaning: Destroyed or damaged beyond repair.

Part of speech: adjective

Example: The abandoned house was completely ruined.

Category: Nature › Weather

Synonyms:

• destroyed
• wrecked

Meaning: Causing or likely to cause ruin.

Part of speech: adjective

Example: The ruinous decision led to financial loss.

Category: Nature › Weather

Synonyms:

• disastrous
• devastating

Meaning: To make a deep, continuous sound.

Part of speech: verb

Example: The thunder rumbled in the distance.

Category: Nature › Weather

Synonyms:

• growl
• roar