The present research intends to demonstrate how thesauri, with their terminological choices, manage to perpetuate oppressions that contribute to a policy of social domination used to maintain hegemonic groups in the center. Three terms were analyzed, namely, “black market”, “homosexuality” and “transsexualism”, from two thesauri with great repercussions, the Basic Controlled vocabulary, from the Federal Senate, and the Thesaurus from the Inter-American Court of Human Rights. The research interprets, from the cases and results analyzed, that there are, in the representation of knowledge and in the thesauri, manifestations and representations of racism, LGBTphobia and gender violence. Therefore, it is pertinent and relevant to ask, within what we consider cultural war, what roles these devices and instruments can have for the promotion of a more plural and inclusive society