cylinder
parallel polygons.
It is simply a shape which has two bases which are regular polygons. There is no special name for such shapes.
A prism has two parallel and congruent bases in the shape of polygons. Example - a cereal box (is rectangular prism). The top and bottom are rectangles(a polygon). They are the same size and shape (congruent) and also parallel. A cube (think of six sided dice) is a special rectangular prism. Imagine a a box where the top and bottom are triangles (of the shape size and shape). This is called a triangular prism.
Sounds like a rectangular solid to me, such as an elongated box.
Prism
The shape of one of the two parallel bases.The shape of one of the two parallel bases.The shape of one of the two parallel bases.The shape of one of the two parallel bases.
It is a polygonal prism.
That would be some kind of prism. To answer the question more specifically, I would need to know the shape of the bases.
Prism!
They could be pentahedra in the form of triangular prisms or octahedra in the form of triangular antiprisms.
heptagonal prism
It is a polygonal prism.