cube
rectangular prism
a squard shap.
hexagonal prism In geometry, the hexagonal prism is a prism with hexagonal base. This polyhedron has 8 faces, 18 edges, and 12 vertices. Since it has 8 faces, it is an octahedron. However, the term octahedron is primarily used to refer to the regular octahedron, which has eight triangular faces. https://en.wikipedia.org/wiki/Hexagonal_prism#/media/File:Hexagonal_prism.png
There is no simply connected shape with these properties. Euler's characteristic requires that Faces + Vertices = Edges + 2
It could be simply a smooth lump or it could be regular (ellipsoidal).
Shap's population is 1,221.
Shap Abbey was created in 1190.
Shap Abbey ended in 1540.
Shap railway station ended in 1968.
Shap railway station was created in 1846.
Shap Smith was born on 1965-12-16.
I would call (not cal) an 8 faced shape (not shap) an octahedron.