Rubicon
Rubicon noun - The boundary in ancient times between Italy and Gaul; Caesar's crossing it with his army in 49 BC was an act of war.
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Synonyms for Rubicon
Zero hour and Rubicon are semantically related in crucial point topic. In some cases you can use "Zero hour" instead a noun "Rubicon".
Zero hour
Zero hour noun - A time or state of affairs requiring prompt or decisive action.
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Synonyms for Zero hour
Rubicon and zero hour are semantically related in appointed time topic. You can use "Rubicon" instead a noun phrase "Zero hour".
Mutual synonyms
Related pairs
Cite this Source
Zero hour and Rubicon. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/rubicon/zero_hour
Rubicon & Zero hour. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/rubicon/zero_hour>.
Zero hour or Rubicon. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/rubicon/zero_hour.
Google Ngram Viewer shows how "Rubicon" and "zero hour" have occurred on timeline