Sort of, Solids have a fixed shape, while liquids have no fixed shape.
The easiest way to separate a solid from a liquid is by filtration.
Decanting is not typically used to separate a solid from a liquid. It is a process used to separate a liquid from a solid, often by carefully pouring off the liquid while leaving the solid behind in the container. To separate a solid from a liquid, techniques like filtration or centrifugation are usually more effective.
solid melts to liquid and liquid boils to solid
A filter paper cannot separate an insoluble solid from a liquid, as the solid remains trapped on the paper while the liquid passes through. Additionally, methods like evaporation would not effectively separate them without altering the state of the liquid. Techniques such as centrifugation or decantation may also be ineffective if the solid is too fine or uniformly dispersed in the liquid.
A liquid - but the shape is that of the container.