Any member of the prism family.
Prism.
cubes, prisms, dodecahedrons...
Any polyhedron other than a pyramid.
There is no polyhedron that meets these requirements. But there are many possible non-polyhedral shapes: for example, a hemisphere, a cone, a torus (doughnut) sliced by a plane perpendicular to its axis.
A hexahedron has six faces. There are seven topologically distinct convex shapes and three concave ones. The faces can be triangles, quadrilaterals or pentagonal and the number of edges can range from 9 to 12. The number of vertices is 4 fewer than the number of edges.
Prism.
octahedron
A dodecahedron
Hexahedron
cubes, prisms, dodecahedrons...
Any polyhedron other than a pyramid.
A shape in fewer than 3 dimensions.A shape with one or more curved faces or edges.
There are 2 fewer faces.
A heptahedron is one possible answer.A heptahedron is one possible answer.A heptahedron is one possible answer.A heptahedron is one possible answer.
A pentahedron (eg square based pyramid) or a hexahedron (cuboid), or a heptahedron (a pentagon based prism). There are other shapes.
an octagon
There is no polyhedron that meets these requirements. But there are many possible non-polyhedral shapes: for example, a hemisphere, a cone, a torus (doughnut) sliced by a plane perpendicular to its axis.