The word "robot" has a number of synonyms, such as android, automaton, cyborg, droid, machine, mechanical man, and humanoid. Android refers to a robot that is designed to look and act like a human being, while an automaton is a self-operating machine. A cyborg is a combination of a human and machine, while a droid is a fictional robot in popular culture. Machine and mechanical man are more general terms, and refer to any type of automated device. Finally, humanoid describes any robot that resembles a human in appearance or behavior. These synonyms demonstrate the diversity of robotic technology and its evolving role in human society.