The word "act-courage" has several synonyms that can be used to express the same idea. Some of these synonyms include bravery, fearlessness, fortitude, boldness, valor, gallantry, and heroism. Each of these words highlights the idea of standing up to difficult situations, facing challenges head-on, and persevering in the face of fear and adversity. These synonyms can be used in a variety of contexts, whether to describe the actions of a soldier on the battlefield, a firefighter rescuing people from a burning building, or an ordinary person facing a difficult personal struggle. Regardless of the specific situation, the idea of acting with courage is essential for overcoming obstacles and achieving success.