Replica means an exact copy or a duplicate of something. Its antonyms would be original, genuine, authentic, unique, and distinctive. These words indicate that the item in question is not a copy or imitation but rather the real thing. Other antonyms for replica could be different, contrastive, dissimilar, or opposite. These words suggest that the item has distinct characteristics that set it apart from any duplicates or copies. For example, an antique that differs significantly from replicas made in modern times could be described as different or contrastive. Overall, antonyms for the word replica emphasize the importance of authenticity and uniqueness.