Here are some words that can be opposites of harmony, depending on what you are going for:
The opposite of harmony in music is dissonance. Dissonance means "the lack of harmony among musical notes". Another word that could be used to describe the opposite of harmony is cacophony, which means "a harsh, discordant mixture of sounds."
chaos
The opposite of discord is harmony, which refers to a state of peaceful coexistence and agreement. Harmony signifies unity, cooperation, and a lack of conflict or disagreement among individuals or groups.
calm, harmony, order, peace
as
i have no ide though maybe clash
Harmony and peace are opposites for discord.
Words that are opposites (antonyms) of disharmony are agreement, peace, accord, and harmony.
Antonyms for the noun disarray are arrangement, harmony, order, or orderliness.
musically, dissonance is the opposite of harmony, so the sounds clash and jar
The opposite of quarrel is harmony or agreement. While a quarrel involves conflict or disagreement, harmony implies a state of peaceful coexistence and mutual understanding. In a harmonious situation, individuals or groups work together collaboratively rather than confrontationally.
Dissonance