The answer to the crossword for the term 'Head of Olympus' is OMICRON, which is a seven letter word. Omicron is the Greek letter that is used to represent the head of the Olympian gods in Greek mythology. The Olympian gods were the principal gods of the Greek pantheon, and the head of the gods was Zeus, who was also known as Jupiter or Jove. Zeus was the king of the gods and the ruler of Mount Olympus, the home of the gods.