There are several synonyms for the phrase "regains composure." One of the closest synonyms is "recovers poise." Other options include "calms down," "settles down," and "recollects oneself." These expressions refer to regaining one's mental or emotional balance after feeling unsettled or upset. Some other related phrases include "collecting oneself," "centering oneself," and "regaining control." The concept of regaining composure is important in managing stress and maintaining emotional stability in challenging situations. In order to accomplish this, people may use different techniques such as deep breathing, mindfulness, or simply taking a break to clear their minds.