Synonyms|33Antonyms|0|Broader|0Narrower|0Related|0
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insistent(prompt, fast, quick, immediate, urgent)
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instantaneous(prompt, fast, quick, immediate, urgent)
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jiffy
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on-the-spot(prompt, fast, quick, immediate, urgent)
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on the spot
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present
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present-day
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present day(expression, fast, urgent)
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prompt
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quick(prompt, fast, immediate, urgent, instantaneous)
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trice
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twinkling
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wink
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APASmart Define. (2013). split-second thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/split-second/thesaurus/synonyms
ChicagoSmart Define. 2013. "split-second thesaurus" https://smartdefine.org/split-second/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2013, split-second thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/split-second/thesaurus/synonyms>.
MLASmart Define. "split-second thesaurus" 17 June 2013. Web. 21 September 2026. <https://smartdefine.org/split-second/thesaurus/synonyms>