What is the general name for any solid figure with six faces, such as a cube?

Which planet has the shortest day in the solar system, spinning once in under 10 hours? Quakers formally belong to the Religious Society of whom? What is the term for a remedy that counteracts a swallowed poison? In Scotland, what is a mountain over 3,000 feet called, after the man who listed them in 1891? What word describes any system of persons ranked one above another? Which Texas city is nicknamed "Big D"? What term describes a war carried out with papal sanction, like the medieval expeditions to the Holy Land? Which "Fear of Flying" author wrote the 1990 novel "Any Woman's Blues"?