The Oxford Thesaurus An A-Z Dictionary of Synonyms - pillarn.

1) column, pilaster, pile, piling, pier, upright, post, shaft, prop; atlas, caryatid: The roof is supported by a single pillar. Lot's wife was turned into a pillar of salt. 2) mainstay, supporter, worthy, upholder, backbone, (tower of) strength, leader: Cummings has been a pillar of strength in our community.