Authenticity is a quality that we all value in life. It means that something is genuine, trustworthy, and sincere. If you're looking for synonyms for the word "autêntico" in Spanish, you can use words like real, genuine, bona fide, true, actual, and legitimate. These words describe people, things, or events that are truly authentic and honest. They denote something that is not counterfeit or false and is exactly what it claims to be. Using these synonyms, you can make your speech or writing more varied and engaging, while also conveying the precise meaning you want to express.