Words that Start with O for Kids - List of Essential Vocabulary Words

The orange ball is big and round.

When I fall down, sometimes I say "ouch!"

I have one teddy bear that I hug at night.

Grandma is old but she tells funny stories.

It's okay to cry if you are sad or hurt.

Turn the light off before we go to bed.

Let's go out and play in the garden.

I love playing outside with my friends.

Only I get to pick the color of my cup.

Once I saw a bright star twinkle in the night sky.

On my table, I have a toy train and blocks.

Or we can play hide-and-seek instead of tag.

Ocean waves are big and blue, and fun to watch.

Oatmeal is what I eat for breakfast, with lots of honey.

Oh, look at the pretty flowers in the garden!

Of all my toys, the teddy bear is my favorite.

Outdoor games are so much fun when the sun is shining.

Ox are strong animals, bigger than horses!

Our family goes to the park every Sunday.

Ours is the house with the red door and the big tree.

I own a book about dinosaurs.

We obey the rules when we play games.

Dad rowed the boat using an oar.

When you open the door, you'll see my new puppy.

The cat sat on the mat, which is the opposite of the dog.

I saw an otter swimming at the zoo.

I have one cookie and my sister has the other.

The ball we play with is shaped like an oval.

Mom puts the cookies in the oven to bake.

Jump over the puddle so you don't get wet!

The friendly officer helps people in our town.

Dad often reads me a story before bed.

There's a strange odor coming from the kitchen.

Do you like to visit Mom's office when she's working?

I want an olive on each of my fingers!

The onion made me cry when I helped in the kitchen.

It's odd how my socks keep disappearing.

The storybook outlaw was captured by the sheriff.

Water will overflow the cup if you pour too much.

At night, the owl hoots in the big oak tree.

We should follow the order when playing games.

I saw an opening in the fence and peeked through.

The ostrich at the zoo can run really fast!

Help me organize my toy cars by color.

Hanging the ornament on the tree is my favorite part!

The story of the orphan kitten made me feel sad.

The orphaned kittens were adopted by a new family.

She had an original idea for her art project.

We picked apples in the orchard during our school trip.

The superhero managed to overpower the villain in the story.

Satellites orbit the Earth every day.

He wore his favorite superhero outfit to the costume party.

Her answer was so outstanding that it impressed the whole class.

The outer layer of the Earth is called the crust.

Who is the owner of that lost puppy?

She jumped over an obstacle in the playground race.

He made an obnoxious sound that made us all laugh.

The object of the game is to collect the most stars.

We fed the horses some oats at the farm.

The old oak tree has been standing for over a hundred years.

The operator answered the phone to help us with our question.

Doctors operate to help people get better.

She learned about the heart during the operation game.

The machinery felt oily after being used all day.

Mom applied ointment to the scrape to help it heal faster.

The car needs more oil to run smoothly.

I want to offer to help with the chores.

When we play tag, I can outrun my friends.

During the science class, we talked about how important oxygen is.

If I save my allowance, I will owe less on the new game.

In the movie, the brave knight will overturn the evil king's plan.

An ounce of honey is sweet enough for my tea.

We will go to the park unless it rains; otherwise, we'll stay home.

The president is an official leader of our country.

Playing fair means not breaking any offense during the game.

Understanding the odds helps us predict what might happen.

My parents occupy the front seats when we drive to Grandma's house.

My birthday is a special occasion we celebrate every year.

Obviously, brushing your teeth is important for a bright smile.

Being obedient means listening to my teacher's instructions carefully.

Pandas were originally found in the wild forests of China.

The ancient oriental dragon is a symbol of good luck.

Ordinary days can sometimes turn into unexpected adventures.

An orderly room is easy to play in.

There's always an option between juice or milk at breakfast.

Playing chess means thinking about opposing moves.

My opponent in the chess game was very clever.

Everyone has a different opinion on what game to play next.

Obedience is important when we have classroom rules.

Sometimes while playing, an offence can cause a pause in the game.

When you offend someone, it's important to apologize.

It is not nice to say something offensive to your friends.

We have a picnic occasionally at the park when the weather’s good.

The person who lives in that house is the occupant.

Our family went on an overland trip across the country.

The knight planned to overthrow the evil king in the story.

Dad says not to overwork yourself during soccer practice.

Trying to grab the cookie jar was an overreach for the little boy.

Some people think that superhero movies are overrated.

A pile of rocks was an obstruction on the bicycle trail.

When you don't listen, you obstruct the flow of our game.

Her obstinacy made it hard for her to apologize, even when she was wrong.

The final level in the video game was a real ordeal to beat.

The table was oblong, which made it perfect for the craft project.

In science class, the growth of the plants was observable over two weeks.

Someone who breaks the law is called an offender.

Many grown-ups go to their occupation every day to work.

In music class, we learned an ode about the changing seasons.

It's amazing how radio waves are omnipresent, surrounding us everywhere.

Always check your homework so you don't omit any important answers.

Having a positive outlook can make you happier.

She strived to outdo her last performance at the piano recital.

The outcry from fans was huge when the concert was canceled.

Living on the outskirts of town means we have a lot of open space to play.

He lay with his arms outstretched, making snow angels in the winter.

It's our obligation to be kind and honest with our friends.

When I spun around too fast, I felt like I was in oblivion.

Digging in my backyard, I wondered about the origin of the buried treasure.

Mom told us about the chickenpox outbreak at my cousin's school.

Her outburst of laughter filled the room with joy.

The night sky was clear, showcasing the moon's beautiful orb.

We learned in class how metals are extracted from ore.

The old story spoke of an oracle who could see the future.

His overbearing attitude made teamwork difficult.

The car is old, and it's time for a major overhaul.

Their farm is in an outlying area, surrounded by open fields.

An outpost is a distant military camp on the frontier.

A little seedling is the beginning outgrowth of a mighty tree.

The outset of her journey was filled with excitement and hope.

The path ahead was obscure, hidden by the thick fog.

A rare occurrence happened today; it snowed in April!

He took an oath to always tell the truth.

At school, we learn how to oblige others with kindness.

Optic nerves connect our eyes to our brain to help us see.

The oppressed people hoped for freedom and fairness someday.

There was an opposition group to the unfair rules.

He will oppose the plan if it's not good for everyone.

Birds feeding their offspring is a beautiful sight.

Sometimes a little offset can make a huge difference in a design.

An omnipotent ruler would have unlimited power.

The orchestra played an overture before the main performance.

The manager will oversee the construction of the new park.

An oversight by the committee delayed the project's progress.

The lightning was an omen that the storm was very close.

That dark, ominous cloud means we might get rain.

He realized his mistake was an omission from the report.

The ladder was placed in an oblique angle against the wall.

Stories about the occult often involve witches or ghosts.

He was oblivious to the fact that his shoelaces were untied.

For the science project, her objective was to build a volcano.

My father says floppy disks are now obsolete technology.

It's unfair when powerful people oppress the weak.

Some history books describe the oppression of people long ago.

During the game, there was an onslaught of goals by the other team.

The ancient ruins had been hidden in obscurity for centuries.

The clown wore an outlandish outfit that made everyone laugh.

The painting was so opaque that I couldn't see any light through it.

The math homework felt onerous and took hours to complete.

The famous orator delivered an inspiring oration that moved everyone in the audience.

Her conservative views were very orthodox for our traditional community.

The harsh oppressor had little regard for the well-being of the people.

The ship was in the offing, barely visible on the ocean's horizon.

In the story, the omniscient narrator knew all the characters' thoughts and feelings.

The occidental traditions seemed quite different from the ones we have here in the East.

Mr. Jenkins found the littering in the park to be an odious act.

James was obliging when he volunteered to help set up chairs for the school event.

The orthodoxy of her views was challenged during the debate competition.

She practiced her oratory skills for the upcoming speech contest.

The opulent mansion at the end of the street always looked like something out of a movie.

They learned about Civil War ordnance during their field trip to the historical museum.

It was ostensible that the magician's rabbit appeared out of nowhere.

For our experiment, the ostensible reason was to understand plant growth, but we really wanted to grow the biggest tomato.