Meaning: made of oak wood

Part of speech: adjective

Example: The oaken table is very sturdy.

Category: Arts › Furniture

Synonyms: oak

Meaning: a device that holds an oar in place

Part of speech: noun

Example: The oarlock kept the oar secure while rowing.

Category: Sports › Rowing

Synonyms: oar holder

Meaning: a tall, four-sided monument

Part of speech: noun

Example: The obelisk stood proudly in the square.

Category: Arts › Architecture

Synonyms: monument

Meaning: a wide sash worn with a kimono

Part of speech: noun

Example: She tied her obi around her waist.

Category: Fashion › Clothing

Synonyms: sash

Meaning: something that is offensive or unacceptable

Part of speech: adjective

Example: The comments were deemed objectionable.

Category: Society › Behavior

Synonyms:

• offensive
• unacceptable

Antonyms:

• acceptable
• agreeable

Meaning: not influenced by personal feelings

Part of speech: adjective

Example: The report should be objective and factual.

Category: Language › Communication

Synonyms:

• impartial
• neutral

Antonyms:

• subjective
• biased

Meaning: a person who expresses disagreement

Part of speech: noun

Example: The objector voiced concerns about the plan.

Category: Politics › Activism

Synonyms:

• protester
• dissenter

Meaning: not straightforward or direct

Part of speech: adjective

Example: He gave an oblique answer to the question.

Category: Language › Communication

Synonyms:

• indirect
• slanting

Antonyms:

• direct
• straightforward

Meaning: a type of musical instrument, the oboe

Part of speech: noun

Example: He plays the obo in the orchestra.

Category: Arts › Music

Synonyms: oboe

Meaning: a person who plays the oboe

Part of speech: noun

Example: The oboist performed beautifully at the concert.

Category: Arts › Music

Synonyms: obo player

Meaning: related to the act of observing.

Part of speech: adjective

Example: The observational study provided valuable data.

Category: Science › Research

Synonyms:

• watchful
• perceptive

Antonyms:

• unobservant
• blind

Meaning: to think about something too much.

Part of speech: verb

Example: He tends to obsess over small details.

Category: Psychology

Synonyms:

• preoccupy
• haunt

Antonyms:

• disregard
• forget

Meaning: having an excessive preoccupation with something.

Part of speech: adjective

Example: She is obsessed with her fitness routine.

Category: Psychology

Synonyms:

• fixated
• infatuated

Antonyms:

• unconcerned
• indifferent

Meaning: a persistent and intrusive thought or idea.

Part of speech: noun

Example: His obsession with cleanliness is well-known.

Synonyms:

• fixation
• preoccupation

Antonyms:

• indifference
• disinterest

Meaning: relating to or characterized by obsession.

Part of speech: adjective

Example: Her obsessive thoughts made it hard to concentrate.

Category: Psychology

Synonyms:

• fixated
• compulsive

Antonyms:

• carefree
• unconcerned

Meaning: the process of becoming outdated or no longer used.

Part of speech: noun

Example: Technological obsolescence is a common issue in the industry.

Category: Business › Technology

Synonyms:

• decline
• deterioration

Antonyms:

• renewal
• revival

Meaning: stubbornly refusing to change one's opinion or chosen course of action.

Part of speech: adjective

Example: He was obstinate and would not listen to reason.

Category: General

Synonyms:

• stubborn
• headstrong

Antonyms:

• flexible
• yielding

Meaning: the study of the ocean and its phenomena.

Part of speech: noun

Example: Oceanography helps us understand marine ecosystems.

Category: Science › Marine Biology

Synonyms:

• marine science
• ocean studies

Meaning: having eight sides.

Part of speech: adjective

Example: The building has an octagonal shape.

Category: Mathematics › Geometry

Synonyms:

• eight-sided
• octagon-shaped

Meaning: a hydrocarbon used as a fuel, often in gasoline.

Part of speech: noun

Example: Higher octane fuel can improve engine performance.

Category: Science › Chemistry

Synonyms:

• fuel
• gasoline

Meaning: a group of eight people or things.

Part of speech: noun

Example: The octet performed beautifully at the concert.

Category: Music

Synonyms:

• eight-member group
• ensemble

Meaning: a person who is unconventional or strange.

Part of speech: noun

Example: He is considered an oddball for his unique fashion sense.

Category: General

Synonyms:

• eccentric
• weirdo

Meaning: something unusual or peculiar.

Part of speech: noun

Example: The oddity of the situation made everyone laugh.

Category: General

Synonyms:

• quirk
• peculiarity

Meaning: a leftover or remaining part.

Part of speech: noun

Example: He found an oddment of fabric in the drawer.

Category: General

Synonyms:

• remnant
• leftover

Meaning: likely to happen or succeed.

Part of speech: adjective

Example: He is the odds-on favorite to win the race.

Category: General

Synonyms:

• likely
• probable

Antonyms:

• unlikely
• improbable

Meaning: Extremely unpleasant or repulsive.

Part of speech: adjective

Example: The odious smell made everyone leave the room.

Category: General

Synonyms:

• hateful
• repugnant

Antonyms:

• pleasant
• agreeable

Meaning: Having no smell.

Part of speech: adjective

Example: The gas is odourless, making it hard to detect.

Category: Science › Chemistry

Synonyms:

• neutral
• inodorous

Antonyms:

• fragrant
• scented

Meaning: The tube that connects the throat to the stomach.

Part of speech: noun

Example: Food travels down the oesophagus after swallowing.

Category: Medicine › Anatomy

Synonyms: esophagus

Meaning: A hormone that plays a key role in female reproductive health.

Part of speech: noun

Example: Oestrogen levels fluctuate during the menstrual cycle.

Category: Medicine › Hormones

Synonyms: estrogen

Meaning: The internal organs and entrails of a butchered animal.

Part of speech: noun

Example: Some cultures use offal in traditional dishes.

Category: Food › Meat

Synonyms:

• entrails
• giblets

Meaning: Not in a stable position; unsteady.

Part of speech: adjective

Example: The off-balance chair wobbled when I sat down.

Category: General

Synonyms:

• unstable
• uneven

Antonyms:

• steady
• balanced

Meaning: Unconventional or unusual.

Part of speech: adjective

Example: She has an offbeat sense of humor.

Category: Arts › Music

Synonyms:

• unusual
• quirky

Antonyms:

• normal
• conventional

Meaning: Not in the center; displaced.

Part of speech: adjective

Example: The picture was hung off-centre on the wall.

Category: General

Synonyms:

• asymmetrical
• off-center

Antonyms:

• centered
• symmetrical

Meaning: Not well; slightly ill.

Part of speech: adjective

Example: I felt off-colour and decided to stay home.

Category: General

Synonyms:

• unwell
• ill

Antonyms:

• healthy
• well

Meaning: Causing annoyance or displeasure.

Part of speech: adjective

Example: The offending article was removed from the website.

Category: General

Synonyms:

• annoying
• irritating

Antonyms:

• pleasing
• satisfying

Meaning: To present or provide something, often for consideration.

Part of speech: phrasal verb

Example: She decided to offer up her ideas during the meeting.

Category: Business › Negotiation

Synonyms:

• present
• submit

Meaning: Caught by surprise; not prepared.

Part of speech: adjective

Example: He was off-guard when she asked him to dance.

Category: General

Synonyms:

• surprised
• unprepared

Antonyms:

• prepared
• ready

Meaning: Casual or informal; not prepared or rehearsed.

Part of speech: adjective

Example: He gave an offhand response to the question.

Category: General

Synonyms:

• casual
• informal

Antonyms:

• formal
• prepared

Meaning: A person who holds a specific office or position.

Part of speech: noun

Example: The office-holder was responsible for making important decisions.

Category: Politics › Government

Synonyms:

• official
• administrator

Meaning: The ranks of officials in government or organizations.

Part of speech: noun

Example: Officialdom often moves slowly in making decisions.

Category: Politics

Synonyms:

• bureaucracy
• administration