When describing someone who is lacking calm, there are several synonyms that can be used to paint a clearer picture. One word that comes to mind is "agitated." This suggests someone who is restless, anxious, and possibly even irritable. Another synonym is "tense." This describes someone who is tightly wound and on edge, with a level of stress that is palpable in their demeanor. "Nervous" is another possible synonym, indicating someone who is easily startled and jumpy, with a sense of unease that is hard to shake. Finally, "unsettled" suggests a lack of peace or serenity, with a sense of turmoil or disturbance just below the surface.