SYN: Heavy, cloddish, sluggish, clumsy.
ANT: Light, airy, agile, sylph-like, nimble, active.
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KEY: Lunacy.
SYN: Madness, Insanity, derangement, craziness, mania, aberration, hallucination.
ANT: Sanity, reason, intellect, intelligence, rationality, lucidity.
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KEY: Lunatic.
SYN: Madman, maniac, monomaniac.
ANT: Solon, philosopher, luminary, genius.