What is a difference between Amorphous and Glassy solids?

Answer 1

Glassy solids are considered amorphous solids. An amorphous solid is a solid in which there is no long-range order of the positions of the atoms. Common window glass is an amorphous ceramic.

Perhaps you meant what is the difference between "rubbery" and "glassy" states? The temperature at which there is a transition between the glassy and rubbery states is called the glass transition temperature. An amorphous material in the rubbery state is flexible. In the glassy state, it is brittle.

Answer 2

Glassy solids are amorphous. No long range ordering of the atoms. Not all amorphous solids are glassy.