What structure resembles columns and is typically used for support?

The correct term for a structure that resembles columns and is typically used for support is a pillar. Pillars are vertical structures that serve to bear weight and provide stability in various architectural settings, often a key component in classical architecture. They can be seen in buildings, bridges, and other structures where support is necessary.

A capstone refers to the finishing stone at the top of a wall or structure and does not typically function as a column or support structure. A palister, which is less commonly known and often referred to as a type of vertical face or panel in construction, does not fulfill the traditional role of a supporting column. Beams, on the other hand, are horizontal structures that provide support, but they do not resemble vertical columns. Therefore, in the context of structures that look like columns and serve the purpose of support, a pillar is the appropriate answer.