A capitulator is someone who surrenders or yields in the face of difficulty, opposition, or pressure. Synonyms for this term include "conceder", meaning someone who admits defeat or agrees to a compromise, acknowledging the superiority of others. "Quitter" denotes someone who abandons a task or objective without putting up a fight. "Yielder" describes a person who submits to an opposing force or authority. Additionally, "submitter" refers to someone who complies or surrenders to the demands or instructions of others. These synonyms highlight different aspects of capitulation, alluding to the act of giving in or surrendering to an opposing force or situation.