Synonyms of zero hour in English:

zero hour

noun

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

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    Word of the day flippant
    Pronunciation: ˈflɪp(ə)nt
    adjective
    not showing a serious or respectful attitude