* Discord: This is a general opposite of harmony, referring to a lack of agreement or compatibility.
* Chaos: This implies a state of complete disorder and lack of structure, the antithesis of harmony.
* Conflict: This implies a struggle or clash, the opposite of peaceful coexistence.
* Dissonance: This is specifically used in music to describe a lack of pleasing sound, the opposite of consonance.
* Friction: This implies tension and disagreement, the opposite of smooth cooperation.
* Anarchy: This refers to a complete lack of order or government, the opposite of a harmonious society.
The best opposite for harmony will depend on what specific aspect of harmony you want to contrast.