段 【ダン】 step, stair, (flight of) steps, (row of) stitches, columns
(of print), grade, rank, level, counter for breaks in written
language (or speech, etc.), dan, senior rank in martial arts, go,
shogi, etc.
段階 【ダンカイ】 grade, level, stage, class, phase, steps, order, gradation
特段 【トクダン】 special
中段 【チュウダン】 half-way up a slope or stairway, landing, center of three
(horizontal) columns (of print) (centre)