A solid is not a solid when you change the shape and becomes different.
A piece of butter is a solid in solid.
solid-solid
Sublimation is the conversion from solid directly to gas, so the particles of a solid that sublimes would change into a gas.
Typically, it goes like this: Solute + Solvent = Solution But a liquid can also dissolve in liquid; gas in liquid; gas in solid and finally solid in solid. Solid solutions are common in metal...