This is the 17977th most frequent Russian word.
феминистки
Feminists.
Here, 'феминистки' is the subject of the sentence, plural form, referring to women advocating for gender equality.
Феминистки борются за равные права женщин.
Feminists fight for women's equal rights.
In this context, 'феминисток' is in the genitive plural case, indicating a group of feminists in a descriptive manner.
Мы встретили группу феминисток на конференции.
We met a group of feminists at the conference.
Here, 'феминисток' is used in the genitive plural to indicate possession, related to ideologies.