There are several synonyms for the term "blind copy." Some of the alternatives include "BCC" (short for blind carbon copy), "bcc'd," and "blind courtesy copy." All of these terms refer to the same function in email communication, which is to send a copy of the message to a recipient without the knowledge of the other recipients. This can be useful for maintaining privacy or confidentiality, as well as for sharing information with a specific individual without alerting others. Although the terminology may vary, the purpose of this feature remains consistent across different email platforms and applications.