A million euro smile is a phrase used to describe a smile that is both genuine and captivating, often associated with a high degree of happiness or satisfaction. Synonyms for this phrase include "beaming", "radiant", "brilliant", "sparkling" and "charming". These terms are commonly used to describe a person who is delighted, pleased or simply happy. Other synonyms can include "effervescent", "we are free", "irresistible", "animated" and "gleaming". Each of these words has its own unique connotation and meaning, but they all share the same basic sentiment of conveying a warm, lively and joyful expression.