The term TRANSPORTATION FOR HELIOS can be solved by the crossword solution CHARIOT, which is a seven-letter word. A CHARIOT is a two-wheeled horse-drawn vehicle used for transportation in ancient times. It was often used in warfare and racing, and was also used to transport gods and goddesses in mythology. In Greek mythology, Helios was the god of the sun, and he was often depicted riding in a CHARIOT across the sky. Therefore, the crossword solution CHARIOT is an appropriate answer for the term TRANSPORTATION FOR HELIOS.