What is another word for "lowness"?

Roget's Thesaurus (1911) lists these synonyms for "lowness": adown, basement, below, beneath, bilge, cellar, concave, crouch, crouched, debased, debasement, depress, depression, down, downwards, ebb, feet, flat, floor, foot, ground, grovel, hold, horizontal, level, lie, low, lower, lying, molehill, most, neap, nether, par, prostrate, prostration, slouch, spring, squat, subjacent.