plural nonnecessities
Definition of nonnecessity
1
: the condition of not being necessary
… the issues being raised go well beyond legalities underlying the necessity or nonnecessity for an environmental impact statement. — Chemical and Engineering News
2
: something that is not a necessity : something inessential or unnecessary
… I had no intimation that … the government would permit shipment of such nonnecessities.— Neil G. Carey
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Merriam-Webster unabridged
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Time Traveler for nonnecessity
The first known use of nonnecessity was in 1593
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