Meaning: Relating to the nucleus of an atom or nuclear energy.

Part of speech: adjective

Example: Nuclear power is a significant source of energy.

Category: Science › Physics

Synonyms:

• atomic
• nucular

Meaning: A family unit consisting of two parents and their children.

Part of speech: noun

Example: The nuclear family is a common family structure in many cultures.

Category: Social › Family

Synonyms:

• immediate family
• core family

Meaning: The central part of an atom or a cell.

Part of speech: noun

Example: The nucleus contains the cell's genetic material.

Category: Science › Biology

Synonyms:

• core
• center

Meaning: A person, thing, or circumstance causing inconvenience or annoyance.

Part of speech: noun

Example: The loud music was a nuisance to the neighbors.

Category: Social

Synonyms:

• annoyance
• bother

Antonyms:

• pleasure
• delight

Meaning: the best or most important person or thing

Part of speech: noun

Example: She is number one in her class.

Category: Arts

Synonyms:

• top
• leader

Antonyms:

• last
• bottom

Meaning: the ability to understand and work with numbers

Part of speech: noun

Example: Numeracy is important for managing finances.

Category: Education › Mathematics

Synonyms:

• mathematical ability
• number skills

Antonyms: innumeracy

Meaning: able to understand and work with numbers

Part of speech: adjective

Example: Being numerate is essential for many jobs.

Category: Education › Mathematics

Synonyms:

• mathematically skilled
• number-savvy

Antonyms: innumerate

Meaning: to care for and encourage growth

Part of speech: verb

Example: Parents nurture their children.

Category: Education › Childcare

Synonyms:

• cultivate
• foster

Antonyms:

• neglect
• abandon

Meaning: related to the nutrients in food

Part of speech: adjective

Example: The nutritional value of this meal is high.

Category: Food › Nutrition

Synonyms:

• dietary
• nutrient-rich

Meaning: a person who advises on matters of nutrition

Part of speech: noun

Example: The nutritionist helped me plan my meals.

Category: Health › Nutrition

Synonyms:

• dietitian
• food expert

Meaning: a small, hard shell that covers a nut

Part of speech: noun

Example: The nut fell from the tree and landed in its nutshell.

Category: Nature › Botany

Synonyms:

• shell
• husk

Meaning: to gently rub or push against someone or something with your nose

Part of speech: verb

Example: The puppy likes to nuzzle my hand.

Category: Nature › Animals

Synonyms:

• snuggle
• cuddle

Meaning: an acronym for 'Old Age Pensioner'

Part of speech: noun

Example: The OAP discount is available for seniors.

Category: Society › Elderly

Synonyms: senior citizen

Meaning: a person who rows a boat

Part of speech: noun

Example: The oarsman trained hard for the competition.

Category: Sports › Rowing

Synonyms: rower

Meaning: a Western film or story

Part of speech: noun

Example: He loves watching an old oater on weekends.

Category: Arts › Film

Synonyms: Western

Meaning: very overweight

Part of speech: adjective

Example: He is considered obese according to health standards.

Category: Health › Nutrition

Synonyms:

• overweight
• fat

Antonyms:

• thin
• slim

Meaning: an acronym for 'obstetrician-gynecologist'

Part of speech: noun

Example: She visits her ob-gyn for regular check-ups.

Category: Medicine › Healthcare

Meaning: a notice of someone's death

Part of speech: noun

Example: The newspaper published her obituary.

Category: Society › Death

Synonyms: death notice

Meaning: a lesson learned from an example

Part of speech: noun

Example: His failure was an object lesson in hard work.

Category: Education › Learning

Synonyms:

• lesson
• example

Meaning: a reason for disagreeing

Part of speech: noun

Example: She raised an objection to the proposal.

Category: Law › Legal Terms

Synonyms:

• protest
• disagreement

Meaning: required to do something

Part of speech: adjective

Example: You are obligated to follow the rules.

Category: Law › Legal Terms

Synonyms:

• required
• bound

Antonyms:

• free
• unbound

Meaning: a duty or commitment

Part of speech: noun

Example: He has an obligation to help his family.

Category: Law › Legal Terms

Synonyms:

• duty
• responsibility

Antonyms:

• freedom
• option

Meaning: required by law or rule

Part of speech: adjective

Example: Wearing a seatbelt is obligatory in the car.

Category: Law › Legal Terms

Synonyms:

• mandatory
• compulsory

Antonyms:

• optional
• voluntary

Meaning: to make someone do something

Part of speech: verb

Example: I will oblige you with your request.

Category: Law › Legal Terms

Synonyms:

• compel
• force

Antonyms:

• free
• release

Meaning: feeling grateful or indebted

Part of speech: adjective

Example: I am obliged to you for your help.

Category: Society › Gratitude

Synonyms:

• grateful
• thankful

Meaning: willing to help

Part of speech: adjective

Example: She is an obliging person who always assists others.

Category: Society › Behavior

Synonyms:

• helpful
• accommodating

Antonyms:

• unhelpful
• selfish

Meaning: not aware of or concerned about something

Part of speech: adjective

Example: She was oblivious to the noise around her.

Category: General

Synonyms:

• unaware
• ignorant

Antonyms:

• aware
• conscious

Meaning: extremely unpleasant

Part of speech: adjective

Example: His obnoxious behavior annoyed everyone.

Category: Society › Behavior

Synonyms:

• offensive
• disagreeable

Antonyms:

• pleasant
• agreeable

Meaning: a woodwind musical instrument

Part of speech: noun

Example: The oboe has a distinct sound.

Category: Arts › Music

Synonyms: woodwind

Meaning: able to be seen or noticed

Part of speech: adjective

Example: The changes in the environment are observable.

Category: Science › Observation

Synonyms:

• visible
• noticeable

Antonyms:

• invisible
• unnoticeable

Meaning: the act of following or obeying a rule or custom.

Part of speech: noun

Example: The observance of traditions is important in many cultures.

Synonyms:

• compliance
• adherence

Antonyms:

• disregard
• neglect

Meaning: the act of watching something carefully.

Part of speech: noun

Example: Her observation of the stars was fascinating.

Synonyms:

• watching
• noticing

Antonyms:

• ignorance
• overlooking

Meaning: a building or place for observing astronomical events.

Part of speech: noun

Example: The observatory is open to the public on weekends.

Category: Science › Astronomy

Synonyms:

• watchtower
• viewing station

Meaning: no longer in use or outdated.

Part of speech: adjective

Example: The obsolete software was removed from the computers.

Category: Business › Technology

Synonyms:

• outdated
• defunct

Antonyms:

• current
• modern

Meaning: a series of obstacles that must be overcome in a race or training.

Part of speech: noun

Example: The children enjoyed running through the obstacle course.

Category: Sports

Synonyms:

• challenge course
• training course

Meaning: a doctor who specializes in childbirth and women's reproductive health.

Part of speech: noun

Example: She visited her obstetrician for a check-up.

Category: Medicine › Obstetrics

Synonyms:

• maternity doctor
• gynecologist

Meaning: the branch of medicine that deals with childbirth and the care of women giving birth.

Part of speech: noun

Example: Obstetrics is a vital field in healthcare.

Category: Medicine › Obstetrics

Synonyms:

• maternity care
• childbirth care

Meaning: to block or impede the progress of something.

Part of speech: verb

Example: The fallen tree obstructed the road.

Category: General

Synonyms:

• block
• hinder

Antonyms:

• assist
• facilitate

Meaning: the act of blocking or impeding something.

Part of speech: noun

Example: The obstruction of the pathway caused delays.

Category: General

Synonyms:

• blockage
• hindrance

Antonyms:

• assistance
• facilitation

Meaning: able to be obtained or acquired.

Part of speech: adjective

Example: The information is easily obtainable online.

Category: General

Synonyms:

• accessible
• available

Antonyms:

• unavailable
• inaccessible