shaft, tunnel, duct, passage, vent, borehole, column, trough, adit, bore, burrow, channel, chute, conduit, flue, hole, passageway, sluice, tube, upcast, well, winze, pit, raceway, airduct, chimney, cylinder, mineshaft, spillway, air shaft, light well … more

sadness, dejection, depression, despondency, dolefulness, gloominess, melancholy, mournfulness, unhappiness, dolour, downheartedness, glumness, infelicity, chagrin, cheerlessness, dejectedness, desolation, disconsolateness, gloom, grief, heartache, misery, sorrow, sorrowfulness, tearfulness, upset, wretchedness, agony, anguish, despair, heartsickness, joylessness, malaise, moroseness, pain, poignancy, regret, woe, bleakness, discontent, discouragement, dispiritedness, dissatisfaction, forlornness, miserableness, woefulness, worry, blues, despondence, disconsolation … more