Hexahemeron is a term that refers to a six-day creation story or the creation of the world in six days according to the Bible. However, many other words can be used to describe this concept, including hexaemeron, sextametheon, and hexameron. While these words may not be as commonly used as hexahemeron, they all carry the same meaning of a six-day creation story. Other terms that could also be used as synonyms include six-day creation narrative, Genesis account, or Mosaic creation story. Overall, there are several different words that can be used to describe the concept of a six-day creation story, with each one having its own unique connotations and associations.