crayon: a coloured pencil or stick of soft coloured chalk or wax, used for drawing
In the dictionary, a crayon can be a coloured pencil or a stick of soft coloured chalk. But, when searching on the internet, it seems that people do distinguish crayons and coloured pencils.
The left ones are coloured pencils and the right ones are crayons (soft coloured chalk), see the picture.
In a casual conversation, can "crayons & colored pencils" be the same?
And if we talk about them technically, they are different, aren't they?