Is there a word for "extreme feminism"?

Feminism is defined as

Feminism is a collection of movements aimed at defining, establishing, and defending equal political, economic, and social rights for women.

in Wikipedia and

A social theory or political movement supporting the equality of both sexes in all aspects of public and private life; specifically, a theory or movement that argues that legal and social restrictions on females must be removed in order to bring about such equality.

in Wiktionary. Masculism is defined as the exact same but with equality for men's rights, which actually means the same.

I think that this is in fact a wrong use of the word feminism which puts emphasis on the word women (~ Latin femina) instead of equality between sexes.

I'm looking for a word that represents a movement which can be assumed and extremist feminism and that supports more or better rights for women above men. Or just supporting more women's rights regardless of those of men. This is what I would think of when hearing feminism, until I discovered this wasn't true.

I'd suggest female chauvinism.

Female chauvinism refers to the attitude that women are superior to men, and it has been used by critics of some aspects of feminism. This should be kept distinct from a similar but not identical concept of the term popularized by "Female Chauvinist Pigs: Women and the Rise of Raunch Culture" a book by Ariel Levy published in 2005.

More discussion is available in the Wikipedia article about female chauvinism and chauvinism in general.

A derisive term used by people to denigrate a person whose feminism is felt to be too extreme is feminazi.

Female domination or female superiority refers to the theory or state of women having authority over men.

Matriarchy refers to a social structure in which women dominate families and familial rights pass from mothers to daughters.