Words that start with O
These are all the words in this dictionary that start with the letter O.
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Octagon
An octagon is a shape with eight sides. The octagon in the picture is red.
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Octopus
An octopus is a creature with eight arms that lives in the sea. The bottom of their arms is covered in suction cups. Most octopi have no bones, so they can squeeze into very small holes to hide. Octopuses have three hearts and blue blood. Octopi are distantly related to snails.
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Off
Something is off if it is not in use or it's not working, and on if it is. The light in the picture is switched off, so the cat is in the dark.
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On
Something is on if it is in use or working, and off if it is not. The light in the picture is switched on.
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One
There is one lion in the picture. The number that comes after one is two.
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