Words that start with O

Something is opaque if you can't see through it. Most things are opaque. The term is most often used to describe stockings that are not transparent.

Ophidiophobia or ophiophobia is a fear of snakes. Many people are scared of snakes because snakes are actually quite dangerous and should be treated with caution, but they do not have a phobia of snakes. People who are ophidiophobic are irrationally afraid of snakes, even just in pictures or on television where there is no real threat.

Two things are opposites if they are as different to each other as possible. Some examples of opposites are black and white, good and bad, little and big.

An orange is the name for both a colour and a citrus fruit. Oranges are similar to lemons but are very sweet and can be eaten raw, squeezed to make juice, and can be made into marmalade. The colour orange can be made by mixing red and yellow paint.

An orb is another word for a sphere. The word is most often used to describe mystical or very decorative spheres, such as Christmas decorations or crystal balls.