A dodecahedron is any polyhedron with twelve flat faces. If you are wondering what a polyhedron is, that is any solid figure with many flat sides.

A detailed imaginary world, often invented by children.

Something related to an empire, like things or people.

To be absolutely sure that something you believe is true.

The word looks and sounds cool but they were not cool at all. They were forced labor camps in the Soviet Union during Stalin’s rule.

Something that is poisonous.

This is a cool word because it means something that is really cold.

A small stone room or monument built to hold the remains of someone.

The point in the orbit of the moon or an artificial object at which it is nearest to the earth.