The term ONE OF THE HORAE refers to the three goddesses of Greek mythology who personified the order and justice of nature. The two crossword solutions for this term are IRENE (5 letters) and EIRENE (6 letters). IRENE is the more commonly used spelling, and it is derived from the Greek word for peace. EIRENE is a less common spelling, but it is also derived from the Greek word for peace. Both words refer to the same goddess, who was one of the Horae.