Words that start with O

Outstretch means to spread out or expand some part of your body. The man in the picture has outstretched arms.

The ovary is an organ in the female reproductive system. Ovaries make eggs, which are needed for pregnancy. They also make hormones such as estrogen and progesterone.

Over is when you move above something. The soldiers in the photo are climbing over a wall.

The sky is overcast if it is almost entirely covered in clouds.
On an overcast day, there is often a high chance of rain.

Something is overgrown if it is covered in growth, outside of where it should be. Gardens can become overgrown if they are neglected and left to run wild with no-one to prune the plants and pull out the weeds.

Something is overloaded if it is carrying a load that is too big for it. The car in the picture is overloaded.

Oversleep means to sleep longer than you planned or needed, and you don't wake up at the usual time.

If you miss your alarm or fall back asleep, you might be late for something.

Owls are birds of prey, which means they eat other animals. They usually sleep during the day and hunt at night. Owls mostly hunt small animals, insects and other birds. They are found in almost everywhere on Earth.
A group of owls is called a parliament.

An ox, also called a bullock, is a cow that is used as a work animal, usually for pulling things like carts and ploughs. The plural of ox is oxen. Oxen are typically yoked together in pairs to pull things.

Oysters are a kind of mollusc that lives in the sea or salty water. Their shell is in two halves like a clam shell, and the oyster can pull it closed. Oysters eat by filtering food from the water that flows over its shell. They live their adult lives stuck to rocks - a young oyster that has just stuck to a rock is called a spat.
Oysters have been eaten for thousands of years. They can be eaten raw, cooked, smoked or as part of another dish like soup.