PKT is an acronym that stands for "packet", which refers to a unit of data that is transmitted across a network. Some synonyms for PKT include "datagram", "frame", and "message". A datagram is a unit of data that is transmitted over a network and is independent of other packets. A frame is a unit of information that is transmitted over a network and includes both data and control information. A message is a unit of data that is transmitted across a network and includes a specific meaning or purpose. While these terms may be used interchangeably with PKT, they each have their own specific meaning and context within network communication.