Antonyms for the word "fulminate against" could include "praise," "commend," or "support." These words signify positive reactions and approval rather than negative criticism. Instead of attacking or condemning, praising shows appreciation for the good qualities or actions of a person, group, or idea. Commending recognizes and compliments someone for doing something well. Supporting denotes approval or endorsement of a particular course of action, belief, or side of an argument. Using these antonyms in place of "fulminate against" can foster constructive conversations and collaborative efforts towards progress and growth rather than unproductive conflicts and division.