Prior arrangement
Zero hour and prior arrangement are semantically related. In some cases you can use "Zero hour" instead a noun phrase "Prior arrangement".
Zero hour
Zero hour noun - A time or state of affairs requiring prompt or decisive action.
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Synonyms for Zero hour
Prior arrangement and zero hour are semantically related. You can use "Prior arrangement" instead a noun phrase "Zero hour".
Cite this Source
Zero hour and Prior arrangement. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/prior_arrangement/zero_hour
Prior arrangement & Zero hour. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/prior_arrangement/zero_hour>.
Zero hour or Prior arrangement. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/prior_arrangement/zero_hour.
Google Ngram Viewer shows how "prior arrangement" and "zero hour" have occurred on timeline