There are several synonyms that can be used to describe a "strong guy". An individual who possesses physical strength can be referred to as muscular, brawny, robust, sturdy or tough. Moreover, a person who is strong-willed and determined can be characterized as tenacious, resolute, firm or unwavering. A person who shows mental toughness and endurance can be described as stalwart, unyielding or tough-minded. Additionally, a man who shows courage and bravery in the face of danger can be described as fearless, heroic or valiant. Hence, there are numerous ways to describe a strong guy, depending on the context and the qualities being highlighted.