The crossword solution for the term 'MERCURY COUNTERPART' is 'HERMES', a 6-letter word. In Greek mythology, HERMES is the messenger of the gods and the counterpart of the Roman god Mercury. He is often depicted as a young man wearing a winged hat and sandals, carrying a herald's staff. HERMES is associated with speed, eloquence, and cunning, and is known for his role in protecting travelers and guiding souls to the underworld.