reply, responseOften used for a spoken reply or comeback in a conversation; in formal contexts it can also mean a response to an accusation or argument.
PO: Ele deu uma réplica rápida e continuou a discussão.
EN: He gave a quick reply and continued the discussion.
replica, copyUsed for an imitation object, like a replica of an artwork or product.
PO: No museu, vimos uma réplica da estátua.
EN: At the museum, we saw a replica of the statue.