円柱【えんちゅう】
column, shaft, cylinder, round pillar (esp. in buildings)
支柱【しちゅう】
prop, stay, support, brace, fulcrum
大黒柱【だいこくばしら】
central pillar (of a building), mainstay (e.g. of an economy), backbone (e.g. of a family), provider, main man
火柱【ひばしら】
pillar of fire, blazing column
氷柱【つらら】
icicle, ice pillar (for cooling a room), ice
門柱【もんちゅう】
gatepost, pier
鉄柱【てっちゅう】
iron pole