Do you dream of living in an oasis amidst the sands of Oman? If we let them, nouns that start with O can whisk us away to magical lands filled with endless wonder. They create a sense of occasion in our favorite novels while we’re introduced to omnipotents with endless power.
We use nouns all day, every day. So, let’s review their many capacities before we dive into an ocean of O-words.
What Is a Noun?
The definition of a noun is “a person, place, thing, or idea.” You’ll notice many of them come after an article, like "a," "an," or "the." Nouns commonly act as the subject of a sentence. For example, "The observer saw him push her to the ground."
Nouns can also serve as the object of a sentence. That means they'll come after the verb. For example, "She sliced the orange." Nouns also function as names, including people, cities, and more.
50 Nouns Starting with O
From oafs, to ogres, to onions, enjoy this long list of O-nouns. Perhaps one or two of them will spice up your next writing piece.
- Oaf - a clumsy person
- Oasis - a fertile place where there is water in the midst of a desert
- Oatmeal - oats that are ground into flakes
- Obedience - the willingness to obey
- Obesity - the condition of being overweight
- Object - anything that is visible
- Obligation - something someone is required to do
- Oblivion - the state of being forgotten
- Oblong - a shape, like a rectangle or an ellipse, with one longer end
- Observer - a person watching something
- Occupant - one that resides in or uses a physical space
- Occasion - a special event
- Ocean - the body of salt water covering much of the Earth
- Octagon - an eight-sided shape
- October - the tenth month of the year
- Octopus - a sea creature with eight sucker-lined limbs
- Ode - a poem written in a clear, lyrical style
- Odor - a distinctive and unpleasant smell
- Offense - something that angers or displeases
- Offer - an act of putting something forth for consideration
- Officer - a person in a position of authority in a business, the police, or the military
- Offshoot - something that derives its origin from a particular source
- Offspring - a child, or the children of a family
- Ogre - a giant monster in legends and fairy tales that eats humans
- Oiliness - the quality of being too slippery or smooth
- Ointment - a semisolid substance used on the skin as medicine
- Olive - a small yellow-green fruit, usually eaten cured
- Omelet - a dish consisting of beaten eggs, seasonings, cheese, or vegetables
- Omen - something believed to predict the future
- Omission - the act of leaving something out
- Omnipotent - one having unlimited or universal power
- Omnivore - someone or something that eats meats and plants
- Onion - a plant with an edible bulb
- Onslaught - a situation where you’re suddenly bombarded with a lot of things at once
- Ooze - the liquid result of a slow leak or spill
- Opal - a gemstone made of hydrated silica
- Openness - an accommodating attitude receptive to new ideas
- Operation - a surgical procedure
- Opinion - a belief or judgment held by a person
- Opportunity - a favorable situation for a positive outcome
- Opposite - something that is the reverse of something else
- Oppression - treating people unfairly, especially with overuse of government power
- Option - the power to make a choice
- Oral - an exam given and taken by speaking
- Orange - a round, sweet, juicy citrus fruit
- Ordinary - an official with jurisdiction in a specified area by right of their office
- Original - the earliest form of something
- Ostrich - a swift-running bird of Africa and SW Asia
- Outcast - a person who doesn’t fit in with the majority and isn’t accepted by the crowd
- Outlook - how things are looking for the future
Types of Nouns
Nouns starting with O are far from ordinary, right? Since nouns can pop up all over a sentence, you probably won’t be surprised to learn there are over 10 different types of nouns. If they’re referring to a person or place, they’re likely acting as a proper noun (e.g. Shrek, Oman, California, France, and The Oriental Hotel). An example of that would be, "Shrek is a kind-hearted ogre."
The opposite of a proper noun is a common noun. These nouns refer to general, unspecified things. In the example above, Shrek is a proper noun. But, if that line simply read, "The ogre was kind-hearted," you'd know the subject was a common noun. Common nouns are neither capitalized nor specific.
Then, there are compound nouns (e.g., sunglasses and doorframes), countable nouns, possessive nouns, and pronouns. It’s common to see both nouns and pronouns in a single sentence: "Jennifer ran down the boardwalk to greet her.”
More Words That Begin With O
Nouns are just the beginning when it comes to words that begin with O. If you're open to going beyond nouns, you'll be excited to discover this list of words that start with O on WordFinder by YourDictionary. Form a full list of O-words organized by length to an easy-to-use search feature that allows you to limit the results to words of a certain length or terms that start, conclude or include specific letters or combinations of letters. Exploring this list provides a great opportunity to explore the full spectrum of O-words in the English language.
An Ode to Openness
The more we read, the more we open our minds to magic. With one flip of the page, we can venture off to unknown worlds filled with mythical dragons, fairy princesses, and ugly ogres. Thanks to literature and poetry, a passport isn’t required to enter new realms. The further you escape into fantasy, the more your vocabulary will grow. Ready to dabble in a little writing yourself? Scan through these nouns that start with N to see if you can fancify your next tale with any of these nuanced nouns.