A "golden smile" radiates warmth, happiness, and positivity. Some synonyms that could be used to describe this type of smile include radiant, beaming, bright, glowing, sunny, cheerful, joyful, gleeful, and sparkling. "Radiant" suggests a smile that shines out, whereas "beaming" has a connotation of intense happiness. "Bright" might imply a smile that is noticeable from a distance, while "glowing" suggests a smile that is suffused with joy. "Sunny" implies a smile that is warm and welcoming, while "cheerful" implies a smile that is infectious and uplifting. "Joyful" suggests a smile that is full of delight, and "gleeful" implies a smile that is filled with playful happiness. Finally, "sparkling" suggests a smile that is filled with joy and energy.