Synonyms for the term "gallant act" include "heroic deed," "valiant gesture," "brave action," "noble feat," and "courageous act." These words all describe actions that demonstrate courage and selflessness, often in the face of danger or adversity. Other synonyms include "chivalrous act," "honorable deed," "daring feat," and "admirable action." These words are often used to describe acts of heroism and bravery in literature and history, such as soldiers who risked their lives to save their comrades or civilians who stood up for what was right in the face of oppression. Whatever term you use, a gallant act is always an inspiring example of human courage and kindness.