Nouns That Start With O

Here we have a list of Nouns that start with O. You will learn the most commonly used nouns in the English language to expand your vocabulary in writing/speaking. Nouns Start with O will help you to learn about some of the most interesting events, emotions, and common things starting with the letter ‘O’.

What Are Nouns Beginning with O?

A noun is a word that commonly functions as the name of a distinct object or group of things, such as a person, place, living creatures, places, actions, qualities, states of existence, or ideas.

Person: Olivia, Owen, Optometrist

Place: Osaka, Ontario, Opera House

Thing: Oven, Oar, Origami, Ocarina

Explore More: Nouns That Start with P

List of Nouns That Start With O

A Full List of Nouns That Begin With O

Nouns Starting With Alphabet O

100+ Popular Nouns That Start With O

20+ Common Nouns That Start with O

Here is a list of common ‘o’ nouns:

• Ocean: Vast expanse of water.
• Office: Workplace for tasks.
• Oven: Appliance for baking.
• Orange: Citrus fruit.
• Octopus: Marine creature.
• Opera: Musical performance.
• Oasis: Desert water source.
• Orbit: Celestial path.
• Oar: Rowing implement.
• Onion: Vegetable with layers.
• Opal: Gemstone with iridescence.
• Organ: Body tissue.
• Oval: Rounded shape.
• Owl: Nocturnal bird.
• Oil: Liquid for cooking.
• Obstacle: Hurdle to overcome.
• Orchestra: Musical ensemble.
• Outlet: Power source.
• Oyster: Shellfish delicacy.
• Obelisk: Tall, four-sided pillar.

List of Abstract Nouns That Start with O

Abstract nouns are intangible concepts, ideas, or emotions that evoke feelings and cannot be perceived through the five senses. Examples include love, happiness, and justice.

Here is a list of Abstract O Nouns:

• Observation: Act of closely watching or examining.
• Optimism: Positive outlook or belief in good outcomes.
• Opulence: Display of great wealth or luxury.
• Organization: Structured arrangement or coordinated effort.
• Originality: Quality of being novel or unique.
• Outcome: Result or consequence of an action.
• Obligation: Binding duty or commitment.
• Opacity: State of being impenetrable to light.
• Opinion: Personal belief or judgment about something.
• Order: Arrangement or sequence of elements.
• Oblivion: State of being forgotten or unknown.
• Orbit: Path of a celestial object around another.
• Openness: Quality of being receptive or transparent.
• Overflow: Excess or spilling over a limit.
• Ovation: Enthusiastic public applause or acclaim.

Related:

Baby Names That Start With O

Positive Words Start With O

Adjectives That Start With O

List of Abstract Nouns That Start with O

Abstract nouns are intangible concepts, ideas, or emotions that evoke feelings and cannot be perceived through the five senses. Examples include love, happiness, and justice.

Here is a list of Abstract O Nouns:

• Observation: Act of closely watching or examining.
• Optimism: Positive outlook or belief in good outcomes.
• Opulence: Display of great wealth or luxury.
• Organization: Structured arrangement or coordinated effort.
• Originality: Quality of being novel or unique.
• Outcome: Result or consequence of an action.
• Obligation: Binding duty or commitment.
• Opacity: State of being impenetrable to light.
• Opinion: Personal belief or judgment about something.
• Order: Arrangement or sequence of elements.
• Oblivion: State of being forgotten or unknown.
• Orbit: Path of a celestial object around another.
• Openness: Quality of being receptive or transparent.
• Overflow: Excess or spilling over a limit.
• Ovation: Enthusiastic public applause or acclaim.

List of Popular Positive Nouns Start with O

Here is a list of Positive O Nouns with definitions:

Optimism

• Meaning: Positive outlook or belief in a favorable outcome.
• Synonym: Hopefulness
• Antonym: Pessimism

Opportunity

• Meaning: A favorable chance or circumstance.
• Synonym: Chance
• Antonym: Obstacle

Overflow

• Meaning: Abundance or excess of something positive.
• Synonym: Abundance
• Antonym: Scarcity

Oneness

• Meaning: Unity and harmony.
• Synonym: Unity
• Antonym: Division

Openness

• Meaning: Willingness to accept new ideas or experiences.
• Synonym: Receptiveness
• Antonym: Closed-mindedness

Originality

• Meaning: Creativity and uniqueness.
• Synonym: Creativity
• Antonym: Conformity

Optimality

• Meaning: The state of being the best possible.
• Synonym: Excellence
• Antonym: Mediocrity

Oasis

• Meaning: A place of peace, relief, or happiness.
• Synonym: Sanctuary
• Antonym: Desolation

Outstanding

• Meaning: Exceptionally good or impressive.
• Synonym: Exceptional
• Antonym: Mediocre

Overachievement

• Meaning: Excelling beyond expected levels.
• Synonym: Excelling
• Antonym: Underachievement

Overflowing

• Meaning: Filled to the brim with positivity.
• Synonym: Abundant
• Antonym: Depleted

Overture

• Meaning: An introduction or proposal indicating positive intentions.
• Synonym: Proposal
• Antonym: Refusal

Ownership

• Meaning: The state of possessing something.
• Synonym: Possession
• Antonym: Lack

Onwardness

• Meaning: The quality of moving forward positively.
• Synonym: Progress
• Antonym: Stagnation

Ovation

• Meaning: Enthusiastic applause or approval.
• Synonym: Applause
• Antonym: Criticism

Open-heartedness

• Meaning: Generosity and sincerity in feelings.
• Synonym: Generosity
• Antonym: Stinginess

Outpouring

• Meaning: A spontaneous expression of positive emotion.
• Synonym: Expression
• Antonym: Restraint

Overjoy

• Meaning: Extreme happiness or delight.
• Synonym: Elation
• Antonym: Despair

Opulence

• Meaning: Great wealth and luxury.
• Synonym: Luxury
• Antonym: Poverty

Obligingness

• Meaning: Willingness to assist or accommodate.
• Synonym: Helpfulness
• Antonym: Reluctance

15+ List of Proper Nouns That Start with O

Proper nouns with O are specific names of unique entities, such as individuals, places, or organizations, always capitalized to distinguish them from common nouns.

• Osaka
• Olivia
• Olympus
• Oakley
• Oman
• Ontario
• Oprah
• Orlando
• Oxford
• Osaka Castle
• Oceanic Airlines
• Oliver Twist
• Oklahoma City
• Oreo
• Oak Ridge

List Of Collective Nouns That Start With O

Here is a list of Collective O-nouns with meaning:

• Orchestra: A group of musicians playing instruments.
• Organization: A collective of people with a common purpose.
• Outfit: A set of clothing or equipment.
• Oscillation: A movement back and forth.
• Opulence: Wealth and luxury.
• Oasis: A fertile area in a desert.
• Oven: An enclosed cooking appliance.
• Oncology Team: Medical specialists treating cancer.
• Occasion: A particular event or ceremony.
• Observer Corps: A group monitoring and reporting.
• Overload: Excessive load or burden.
• Order: An organized arrangement or sequence.
• Outlay: Expenditure or investment.
• Outfield: The area in baseball beyond the bases.
• Office: A place of business or administration.

FAQs (Nouns Starting with O)

What are some nouns starting with O?

Nouns starting with O include objects like ocean, orchestra, opera, and office, and names such as Olivia, Oliver, and Olympics.

What are some positive nouns that start with O?

Positive nouns starting with O include optimism, opportunity, outlook, originality, and oasis, fostering positivity and growth.

What are nouns beginning with the consonant O?

Nouns beginning with O include ocean, orchestra, owl, office, opera, olive, origami, octopus, orchid, oasis, and orange.

What’s the name of a famous person whose name starts with O?

Oprah Winfrey, an influential media mogul, philanthropist, and talk show host, is a famous person whose name starts with the letter O.

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