What is the property that liquids and solids share? What is the property that liquids and gases share?

Answer 1

Liquids and solids are condensed matter; their molecules are close together; they are very stiff in compression.
Liquids and gases are mobile; their molecules are not in fixed positions and are disordered; they do not resist bending and shear and thus will flow and conform to the boundaries of a container.
See the reference.