What is the same and different about a prism and a pyramid?

Well they are different shapes:

prism:

A solid object that has two identical ends and all flat sides.

The cross section is the same all along its length.

The shape of the ends give the prism a name, such as "triangular prism"

It is also a polyhedron.

Pyramid:

A solid object where:

The base is a polygon (a straight-sided shape)

The sides are triangles which meet at the top (the apex).

It is a polyhedron.

This is a square pyramid, but there are also triangular pyramids, pentagonal pyramids, and so on.

Difference:

In a pyramid there are 4 faces which are triangular in shape and there is 1 face which is a square which is its base. On the other hand, A prism has 3 rectangular faces and 2 equilateral triangular faces which work as its base.

Similarity:

Both of them have triangular faces. Actually I don't find any similarity between them, except that and they are polyhedrons. Plus the base of a pyramid alters the name of the pyramid, just like the end of a prism does.