When finding words to describe someone as calm, there are many synonyms to choose from. Perhaps the most obvious is "serene," which suggests a deep sense of peace and tranquility. "Tranquil" is another option, emphasizing a state of calm that remains even in the midst of chaos. "Placid" connotes a smoothness and stillness, while "composed" and "collected" suggest a person in control of their emotions. "Imperturbable" is another option for someone who maintains their calm regardless of circumstances, while "unflappable" suggests a person who is unshakeable in their calm. Regardless of the word chosen, the idea of calm is universally desirable and indicative of a well-rounded individual.