Strong-willed is a term used to describe a person who is determined and resolute in their actions. There are many synonyms that can be used to describe a person with this trait, including stubborn, tenacious, firm-minded, resolute, unwavering, steadfast, and determined. All of these words indicate a person who possesses great inner fortitude and an unshakable resolve to achieve their goals. Other synonyms for strong-willed include persistent, unyielding, headstrong, and unrelenting. These words all describe a person who is unmovable in their beliefs and actions, even in the face of adversity. A person who is strong-willed is often admired for their admirable and inspiring traits, and their determination is often the key to their success.