The term "end system" is often used in the realm of computer networking to describe devices that communicate with each other over a network. However, there are many synonyms for this term that can be used interchangeably. Some examples include "host", "terminal", "client", "server", "workstation", and "node". These terms all refer to devices that are capable of sending and receiving data over a network, whether they are acting as a source or a destination for that data. The choice of which term to use may depend on the specific context and the level of technical detail required, but all of these words can be used to describe the same basic concept.