One synonym for "machine instructions" is "assembly language instructions," which refers to the low-level programming language used by microprocessors and other integrated circuits. Another term is "opcode," which is short for "operation code," the component of an instruction that specifies the operation to be performed. "Command" is another alternative for machine instructions, which refers to the specific action the computer is being told to perform. Finally, "instruction set" is another synonym, which refers to the collection of commands that a particular CPU or processor can understand and execute. All of these terms describe the underlying commands that enable computers and machines to perform specific actions and carry out tasks.