丸柱[marubashira] column
火柱[hibashira] pillar of fire
蚊柱[kabashira] mosquito swarm
貝柱[kaibashira] adductor muscle
巻柱[makibashira] gold-covered woodwork at a temple in Hiraizumi

魂柱[konchuu] sound post (violin, etc.)
支柱[shichuu] prop
斜角柱[shakakuchuu] oblique prism
人柱[hitobashira] human pillar
水銀柱[suiginchuu] column of mercury

筝柱[kotoji] bridge of a koto
筝曲[soukyoku] koto music
古筝[kosou] Guzheng (type of ancient Chinese zither)

俗筝[zokusou] modern koto (in contrast to the gagaku koto or gakuso)
楽筝[gakusou] ancient type of koto with 13 strings used in Gagaku music