What is the opposite word of "calm"?

Hi there . Thank you for your question. 

The opposite of the word 'calm' would be 'chaos'. This is a state of confusion and disorder. It is characterized by intense emotions, loud noises, and a lack of control. Unlike calmness, chaos brings a feeling of unease and discomfort. In a chaotic environment, one would feel overwhelmed and unable to focus or think clearly. Whereas calm refers to an environment where there is a sense of peace and tranquility.

I hope this helps you and we look forward to any further questions you may have.