"Uncalms" is not a commonly known word in English language. However, if it were to have antonyms, they would include words like "calm", "peace", "serene", "tranquil", and "composed". All these words signify a state of peacefulness, tranquility, composure and serenity. Opposites of "uncalms" would be words that connote unrest, agitation, disturbance, and unease. Examples of these would be words like "chaotic", "turbulent", "unruly", "violence", and "chaos". Many other words can be antonyms of "uncalms", depending upon the context of the word itself.