Deindividuation is a noun.

What is the noun form of discovery?

noun, plural dis·cov·er·ies. the act or an instance of discovering. something discovered.

What does deindividuation mean?

Deindividuation, Psychology of

Deindividuation is a characteristic of the individual in the crowd. It is a psychological state of decreased self-evaluation, causing anti-normative and disinhibited behavior.