cataclysm 1
noundomain: natural phenomenon
Princeton WordNet [ver.3.1]
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EnglishDefinition
a sudden violent change in the earth's surface
Hypernym
a natural phenomenon involving the structure or composition of the earth
EnglishHyponym
nuclear winter 1
noun
a long period of darkness and extreme cold that scientists predict would follow a full-scale nuclear war; a layer of dust and smoke in the atmosphere would cover the earth and block the rays of the sun; most living organisms would perish
