Meaning: A steep-sided hollow at the head of a valley, often containing a lake.

Part of speech: noun

Example: The hikers reached the cwm after a long trek.

Category: Nature › Geography

Synonyms:

• hollow
• valley

Meaning: An acronym for 'Cover Your Ass', often used in business contexts.

Part of speech: acronym

Example: He sent an email to CYA before the meeting.

Category: Business › Communication

Meaning: A highly toxic chemical compound.

Part of speech: noun

Example: Cyanide can be deadly if ingested.

Category: Science › Chemistry

Synonyms:

• toxin
• poison

Meaning: The study of communication and control in living organisms and machines.

Part of speech: noun

Example: Cybernetics combines elements of biology and engineering.

Category: Science › Biology

Synonyms:

• control theory
• systems theory

Meaning: A genre of science fiction that features advanced technology and a dystopian future.

Part of speech: noun

Example: The movie is a classic example of cyberpunk literature.

Category: Arts › Literature

Synonyms:

• sci-fi
• dystopian fiction

Meaning: Sexual activity conducted via the internet.

Part of speech: noun

Example: Cybersex can involve video chats and messaging.

Category: Arts › Sexuality

Synonyms:

• online sex
• virtual sex

Meaning: The practice of registering domain names to profit from them later.

Part of speech: noun

Example: Cybersquatting can lead to legal disputes over domain ownership.

Category: Business › Internet

Synonyms:

• domain squatting
• domain hoarding

Meaning: A being with both organic and biomechatronic body parts.

Part of speech: noun

Example: In the movie, the hero is a cyborg with enhanced abilities.

Category: Science › Biotechnology

Synonyms:

• android
• robot

Meaning: Happening in cycles; recurring at regular intervals.

Part of speech: adjective

Example: The cyclical nature of the economy can affect jobs.

Category: Economics › Business Cycles

Synonyms:

• repetitive
• periodic

Meaning: A type of bicycle racing on mixed terrain, including obstacles.

Part of speech: noun

Example: Cyclo-cross races are exciting to watch.

Category: Sports › Racing

Synonyms:

• cross racing
• bicycle racing

Meaning: A large-scale air mass that rotates around a center of low atmospheric pressure.

Part of speech: noun

Example: The cyclone caused severe damage to the coastal area.

Category: Science › Meteorology

Synonyms:

• storm
• hurricane

Meaning: A mythical giant with a single eye in the center of its forehead.

Part of speech: noun

Example: In Greek mythology, the Cyclops was known for its strength.

Category: Arts › Mythology

Synonyms:

• giant
• mythical creature

Meaning: A type of particle accelerator that uses a magnetic field to accelerate charged particles.

Part of speech: noun

Example: The cyclotron is used in nuclear physics research.

Category: Science › Physics

Synonyms: particle accelerator

Meaning: A musical instrument similar to a hammered dulcimer, played with mallets.

Part of speech: noun

Example: The musician played a beautiful melody on the cymbalom.

Category: Arts › Music

Synonyms: hammered dulcimer

Meaning: A person who believes that people are motivated purely by self-interest.

Part of speech: noun

Example: He's such a cynic; he never trusts anyone's intentions.

Category: Philosophy › Ethics

Synonyms:

• skeptic
• pessimist

Meaning: In a manner that shows distrust or disbelief in human sincerity.

Part of speech: adverb

Example: He cynically dismissed her offer of help.

Category: Philosophy › Ethics

Synonyms:

• skeptically
• pessimistically

Meaning: An attitude of distrust towards human sincerity and motives.

Part of speech: noun

Example: His cynicism often leads to misunderstandings with friends.

Category: Philosophy › Ethics

Synonyms:

• skepticism
• pessimism

Meaning: A focal point of attention or admiration.

Part of speech: noun

Example: The actress was the cynosure of all eyes at the premiere.

Category: Arts › Theater

Synonyms:

• center of attention
• focal point

Meaning: A method of transforming a message to keep it secret.

Part of speech: noun

Example: The spy used a cypher to communicate securely.

Category: Science › Cryptography

Synonyms:

• code
• cipher

Meaning: A script used for writing several Slavic languages, including Russian.

Part of speech: noun

Example: Cyrillic is used in many Eastern European countries.

Category: Language › Writing Systems

Synonyms:

• Cyrillic script
• Slavic script

Meaning: A closed sac-like structure in the body that can contain fluid or semi-solid material.

Part of speech: noun

Example: The doctor found a cyst on the patient's ovary.

Category: Medicine › Pathology

Synonyms:

• sac
• pouch

Meaning: A genetic disorder that affects the lungs and digestive system.

Part of speech: noun

Example: Cystic fibrosis requires lifelong treatment and care.

Category: Medicine › Genetics

Synonyms:

• CF
• genetic disorder

Meaning: An inflammation of the bladder, often caused by infection.

Part of speech: noun

Example: Cystitis can cause painful urination.

Category: Medicine › Urology

Synonyms:

• bladder infection
• inflammation

Meaning: The study of cells, their structure, and function.

Part of speech: noun

Example: Cytology is important for understanding diseases.

Category: Science › Biology

Synonyms:

• cell biology
• cell science

Meaning: A virus that can cause disease in people with weakened immune systems.

Part of speech: noun

Example: Cytomegalovirus is a concern for organ transplant patients.

Category: Medicine › Virology

Synonyms:

• CMV
• virus

Meaning: The gel-like substance inside a cell, excluding the nucleus.

Part of speech: noun

Example: The cytoplasm contains organelles that perform various functions.

Category: Science › Biology

Synonyms:

• cell fluid
• protoplasm

Meaning: An emperor or king, especially in Russia before 1917.

Part of speech: noun

Example: The czar ruled with absolute power.

Category: History › Monarchy

Synonyms:

• emperor
• monarch

Meaning: The wife of a czar.

Part of speech: noun

Example: The czarina was known for her charitable works.

Category: History › Monarchy

Synonyms:

• empress
• queen

Meaning: Relating to the czar or the czar's government.

Part of speech: adjective

Example: The czarist regime was known for its strict control.

Category: History › Monarchy

Synonyms:

• imperial
• monarchical

Meaning: Regions in the UK where Celtic languages and culture are prevalent.

Part of speech: noun

Example: The Celtic fringe includes parts of Wales and Scotland.

Category: Culture › Cultural Studies

Synonyms:

• Celtic regions
• Celtic areas

Meaning: The established church in England, part of the Anglican Communion.

Part of speech: noun

Example: The Church of England has a rich history.

Category: Culture › Religion

Meaning: The national church in Scotland, also known as the Kirk.

Part of speech: noun

Example: The Church of Scotland plays a significant role in Scottish culture.

Category: Culture › Religion

Meaning: A list of individuals who receive financial support from the government, often related to the monarchy.

Part of speech: noun

Example: The Civil list includes members of the royal family.

Category: Politics › Government

Meaning: A social movement aimed at securing equal rights for all citizens, particularly African Americans in the U.S.

Part of speech: noun

Example: The civil rights movement was pivotal in changing laws.

Category: Politics › Social Movements

Synonyms: civil rights struggle

Meaning: A U.S. government agency that investigates civil rights issues.

Part of speech: noun

Example: The Commission on Civil Rights published a report on discrimination.

Category: Politics › Civil Rights

Synonyms:

• agency
• committee

Meaning: A political party that advocates for the principles of communism.

Part of speech: noun

Example: The Communist Party played a significant role in the country's history.

Category: Politics › Political Parties

Meaning: The group of southern states that seceded from the United States during the Civil War.

Part of speech: noun

Example: The Confederate States fought against the Union.

Category: History › Civil War

Synonyms: Confederacy

Meaning: A region in the southern United States known for its cotton production.

Part of speech: noun

Example: The Cotton Belt was crucial for the economy during the 19th century.

Category: Geography › Regions

Synonyms:

• cotton-producing region
• agricultural area

Meaning: an acronym for the Confederate States of America

Part of speech: noun

Example: The CSA was formed during the American Civil War.

Category: History

Synonyms:

• Confederacy
• Southern states

Meaning: abbreviation for 'dilation and curettage', a medical procedure

Part of speech: noun

Example: The doctor recommended a D and C for the patient.

Category: Medicine

Synonyms: surgical procedure