Synonyms of zero hour in English:

zero hour

noun

  • as zero hour approached, thirty ships swung into position
    the appointed time, the appointed hour, the crucial moment, the vital moment, the critical moment, the moment of truth, the point/moment of decision, the Rubicon, the critical point, the crux
    informal the crunch

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Word of the day kerf
Pronunciation: kəːf
noun
a slit made by cutting with a saw