KEY: Vapid.
SYN: Flat, dull, spiritless, {[irtiilw]?}, tasteless, flavorless, insipid, {[tarn*]?}.
ANT: Spirited, animated, pungent, trenchant, pithy.
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KEY: Vapor.
SYN: Steam, fog, mist, fume, gas, exhalation, [See WORTH].
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KEY: Variable.
SYN: Changeable, mutable, fickle, capricious, wavering, unsteady, inconstant, shifting.
ANT: Unchanging, unchangeable, immutable, constant, firm, true, fast, stanch, unwavering, steady, unalterable, invariable.