Scorn usually means outwardly expression of someone despising or making fun of someone. Contempt & despise are the feelings of disapproval. Despise is often used to mean a stronger feeling such as hate and is more often heard referring to people, their actions, and policies although it can be used for things. Disdain is more often used for things.

these 3 words have the same meaning. It is contempt,feeling that deserves no respect. object of contempt example: Tom was the scorn of the village and the word despise feel contempt for consider worthless.