Pillar
Part of speech: noun
Definition: A large post, often used as supporting architecture.
Example sentence: I fall to pieces when I am hurt, but when it comes to my children, I am a pillar of strength, applying balm and bandages and dressing up their wounds.
Column
Part of speech: noun
Definition: A solid upright structure designed usually to support a larger structure above it, such as a roof or horizontal beam, but sometimes for decoration.A vertical line of entries in a table, usually read from top to bottom: as opposed to a row (which is horizontal).A body of troops or army vehicles, usually strung out along a road.A body of text meant to be read line by line, especially in printed material that has multiple adjacent such on a single page.The same, as a unit of width in a periodical, especially for advertisements.A recurring feature in a periodical, especially an opinion piece, especially by a single author or small rotating group of authors, or on a single theme.Something having similar vertical form or structure to the things mentioned above, such as a spinal column.
Example sentence: Now I'm instantly nervous about the demands of doing a weekly column.