The crossword solutions for the term MARS OR MERCURY are GOD (3 letters), ORB (3 letters), DEITY (5 letters), and PLANET (6 letters). GOD is a term used to refer to a higher power or supreme being, often associated with a particular religion. An ORB is a spherical object, often used to represent the sun, moon, or planets. A DEITY is a supernatural being that is worshipped as having power over nature or human fortunes. Finally, a PLANET is a celestial body orbiting a star, such as Mars or Mercury.