Meaning: Knowing everything.

Part of speech: adjective

Example: The narrator in the story is omniscient, revealing all characters' thoughts.

Category: Literature

Synonyms:

• all-knowing
• wise

Antonyms:

• ignorant
• uninformed

Meaning: A term used in some cultures to denote a type of traditional greeting or expression.

Part of speech: noun

Example: He greeted me with an ono.

Category: Culture

Meaning: A word that imitates a sound.

Part of speech: noun

Example: Words like 'buzz' and 'sizzle' are examples of onomatopoeia.

Category: Linguistics

Synonyms:

• sound word
• echoic word

Meaning: Relating to onomatopoeia; imitative of a sound.

Part of speech: adjective

Example: The word 'bang' is onomatopoeic.

Category: Linguistics

Synonyms:

• sound-imitating
• echoic

Meaning: The study of being or existence.

Part of speech: noun

Example: Ontology explores the nature of reality.

Category: Philosophy

Synonyms: philosophy of being

Meaning: Short for 'opere citato', meaning 'in the work cited'.

Part of speech: noun

Example: You can find more details in op cit.

Category: Academic

Synonyms: cited work

Meaning: Showing varying colors like an opal.

Part of speech: adjective

Example: The opalescent surface shimmered in the light.

Category: Mineralogy

Synonyms:

• iridescent
• shimmering

Meaning: Referring to a type of mining done on the surface.

Part of speech: adjective

Example: The opencast mine was visible from the road.

Category: Mining

Synonyms: surface mining

Meaning: A method or way of doing something, often used in a specific context.

Part of speech: noun

Example: The detective studied the criminal's operandi.

Category: Law › Criminal Law

Synonyms:

• method
• procedure

Meaning: The branch of medicine dealing with the eye and its diseases.

Part of speech: noun

Example: Ophthalmology is a vital field in healthcare.

Category: Medicine › Ophthalmology

Synonyms: eye care

Meaning: A person or organization that influences public opinion.

Part of speech: noun

Example: The journalist is considered an opinion former.

Category: Communication

Synonyms:

• influencer
• thought leader

Meaning: The practice of taking advantage of opportunities as they arise.

Part of speech: noun

Example: His opportunism in business led to quick success.

Category: Business

Synonyms:

• exploitation
• self-interest

Antonyms: principled behavior

Meaning: A person who takes advantage of opportunities, often unethically.

Part of speech: noun

Example: He is seen as an opportunist in the political arena.

Category: Business

Synonyms:

• exploiter
• self-seeker

Meaning: Taking advantage of opportunities, often in a selfish way.

Part of speech: adjective

Example: His opportunistic behavior was frowned upon by his peers.

Category: Business

Synonyms:

• exploitative
• self-serving

Meaning: To keep someone in subservience or hardship.

Part of speech: verb

Example: The regime sought to oppress the people.

Category: Politics

Synonyms:

• subjugate
• tyrannize

Antonyms:

• liberate
• free

Meaning: Subjected to harsh treatment or control.

Part of speech: adjective

Example: The oppressed people fought for their rights.

Category: Politics

Synonyms:

• subjugated
• downtrodden

Antonyms:

• liberated
• free

Meaning: Prolonged cruel or unjust treatment.

Part of speech: noun

Example: The oppression of the minority group was widely condemned.

Category: Politics

Synonyms:

• tyranny
• subjugation

Antonyms:

• freedom
• liberation

Meaning: Unjustly inflicting hardship and constraint.

Part of speech: adjective

Example: The oppressive regime was overthrown.

Category: Politics

Synonyms:

• tyrannical
• cruel

Antonyms:

• liberating
• freeing

Meaning: A person or group that oppresses others.

Part of speech: noun

Example: The oppressor was held accountable for their actions.

Category: Politics

Synonyms:

• tyrant
• oppressor

Meaning: Harsh criticism or censure.

Part of speech: noun

Example: The decision was met with opprobrium from the public.

Category: Communication

Synonyms:

• disgrace
• shame

Meaning: The branch of physics that deals with light and vision.

Part of speech: noun

Example: Optics is essential for understanding how lenses work.

Category: Science › Physics

Synonyms: light science

Meaning: A musical or literary work, especially a large or important one.

Part of speech: noun

Example: Beethoven's Fifth Symphony is one of his most famous opuses.

Category: Arts › Music

Synonyms:

• work
• composition

Meaning: A person or thing regarded as an infallible authority.

Part of speech: noun

Example: The oracle provided guidance to the ancient kings.

Category: Arts › Literature

Synonyms:

• prophet
• seer

Meaning: A sexual activity involving the stimulation of the genitals using the mouth.

Part of speech: noun

Example: They discussed the topic of oral sex in health class.

Category: Health › Sexual Health

Meaning: A greenhouse for growing orange trees and other tropical plants.

Part of speech: noun

Example: The estate featured a beautiful orangery.

Category: Nature › Gardening

Synonyms: greenhouse

Meaning: A skilled public speaker.

Part of speech: noun

Example: He was known as a great orator in his time.

Category: Arts › Public Speaking

Synonyms:

• speaker
• lecturer

Meaning: Relating to the art of public speaking.

Part of speech: adjective

Example: She took oratorical classes to improve her skills.

Category: Arts › Public Speaking

Synonyms: rhetorical

Meaning: A large musical composition for orchestra and voices, typically a narrative on a religious theme.

Part of speech: noun

Example: Handel's Messiah is a famous oratorio.

Category: Arts › Music

Synonyms: musical work

Meaning: The area in a theater where the orchestra sits.

Part of speech: noun

Example: The orchestra pit was filled with musicians before the show.

Category: Arts › Theater

Synonyms: musical area

Meaning: To arrange or organize something, especially music or an event.

Part of speech: verb

Example: She will orchestrate the concert next month.

Category: Arts › Music

Synonyms:

• organize
• arrange

Meaning: The arrangement of music for performance by an orchestra.

Part of speech: noun

Example: The orchestration of the piece was complex.

Category: Arts › Music

Synonyms: arrangement

Meaning: To officially establish someone in a religious role.

Part of speech: verb

Example: He was ordained as a priest last year.

Category: Religion › Clergy

Synonyms:

• consecrate
• appoint

Meaning: The ceremony of ordaining someone as a minister or priest.

Part of speech: noun

Example: Her ordination took place in the cathedral.

Category: Religion › Clergy

Synonyms:

• consecration
• appointment

Meaning: A detailed map produced by a national mapping agency, showing physical features and boundaries.

Part of speech: noun

Example: We used the ordnance survey map for our hiking trip.

Category: Geography › Mapping

Synonyms: detailed map

Meaning: A person who plays a street organ, often accompanied by a monkey.

Part of speech: noun

Example: The organ grinder entertained the crowd in the park.

Category: Arts › Performance

Synonyms: street performer

Meaning: Criminal activities that are coordinated by a structured group.

Part of speech: noun

Example: The police are cracking down on organized crime.

Category: Law › Criminal Law

Synonyms:

• mafia
• syndicate

Meaning: A type of chemical used in pesticides and herbicides.

Part of speech: noun

Example: Organophosphates are commonly used in agriculture.

Category: Science › Chemistry

Synonyms: pesticide

Meaning: The climax of sexual excitement, characterized by intense pleasure.

Part of speech: noun

Example: Many people find it difficult to achieve orgasm.

Category: Health › Sexual Health

Synonyms:

• climax
• peak

Meaning: Relating to or resembling an orgasm.

Part of speech: adjective

Example: The performance was described as orgasmic.

Category: Health › Sexual Health

Synonyms:

• ecstatic
• intense

Meaning: Relating to or characterized by excessive indulgence, especially in sexual pleasure.

Part of speech: adjective

Example: The party had an orgiastic atmosphere.

Category: Health › Sexual Health

Synonyms:

• excessive
• wild