is a specific kind of: solid.

is a broader term that covers: convex polyhedron | concave polyhedron | prism | pyramid | tetrahedron | pentahedron | hexahedron | octahedron | decahedron | dodecahedron | icosahedron | ideal solid, Platonic body, Platonic solid, regular convex polyhedron, regular convex solid, regular polyhedron | prismatoid | trapezohedron ... show more.

derivation: polyhedral.