Vigilant
Vigilant adjective - Paying close attention usually for the purpose of anticipating approaching danger or opportunity.
Without delay and vigilant are semantically related. In some cases you can use "Without delay" instead an adjective "Vigilant".
Without delay
Vigilant and without delay are semantically related. Sometimes you can use "Vigilant" instead an adjective phrase "Without delay".
Mutual synonyms
Cite this Source
Without delay and Vigilant. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/vigilant/without_delay
Vigilant & Without delay. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/vigilant/without_delay>.
Without delay or Vigilant. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/vigilant/without_delay.
Google Ngram Viewer shows how "vigilant" and "without delay" have occurred on timeline