* Chaos: This is a classic opposite, implying a state of complete disorder and confusion.
* Turmoil: This suggests a state of great unrest and disturbance.
* Stress: This focuses on the mental and emotional pressure that is the opposite of calmness.
* Anxiety: This emphasizes a feeling of worry and unease.
* Agitation: This describes a state of restlessness and excitement.
* Disturbance: This is a general term for anything that disrupts peace and quiet.
The best opposite word for "tranquility" really depends on the specific situation and what you want to emphasize.