fascism

As a noun fascism

is a political regime, having totalitarian aspirations, ideologically based on a relationship between business and the centralized government, business-and-government control of the market place, repression of criticism or opposition, a leader cult and exalting the state and/or religion above individual rights. Originally only applied (usually capitalized) to Benito Mussolini's Italy.

As an adjective protofascist is

showing the beginnings of fascism.

As nouns the difference between fascism and antifascism

is that fascism is while antifascism is opposition to fascism.