Quote:
pil·lar(pĭl′ər)n.1.a. A slender, freestanding, vertical support; a column.
b. Such a structure or one similar to it used for decoration.
2. One who occupies a central or responsible position: a pillar of the state.
...As in part of a pier (or bridge)
Quote:
pier(pîr)n.1.a. A platform extending from a shore over water and supported by piles or pillars, used to secure, protect, and provide access to ships or boats.
b. Such a structure used predominantly for entertainment.
2. A supporting structure at the junction of connecting spans of a bridge.
3. Architecture Any of various vertical supporting structures, especially:a. A pillar, generally rectangular in cross section, supporting an arch or roof.
b. The portion of a wall between windows, doors, or other openings.
c. A reinforcing structure that projects from a wall; a buttress.