plural lunacies
Definition of lunacy
1
dated
a
: insanity sense 1
b
: intermittent insanity once believed to be related to phases of the moon
2
: wild foolishness : extravagant folly
3
: a foolish act
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Merriam-Webster unabridged
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Time Traveler for lunacy
The first known use of lunacy was in 1541
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