The antonyms for the word "disharmonize" are terms that denote the opposite of the given word, which means to cause a lack of harmony or agreement. The most common antonym for disharmonize is "harmonize," which means to bring into agreement or accord. Other possible antonyms for this word are "unify," "conform," "reconcile," and "coordinate," all of which suggest a state of agreement, coordination, or congruity. In contrast, the antonyms of disharmonize are those that express discordance, disagreement, or disharmony, such as "disagree," "dissent," "conflict," and "disunite." These antonyms emphasize the opposite of unity and cooperation, highlighting instead the presence of discord and hostility.