Instantaneous
Instantaneous adjective - Done or occurring without any noticeable lapse in time.
Usage example: the thunder following the flash of lightning was nearly instantaneous
Quick is a synonym for instantaneous in immediate topic. In some cases you can use "Quick" instead an adjective "Instantaneous".
Quick
Quick adjective - Having or showing the ability to respond without delay or hesitation.
Usage example: she's a quick wit, always ready with a pun or joke when the moment calls for one
Instantaneous is a synonym for quick in fast topic. You can use "Instantaneous" instead an adjective "Quick", if it concerns topics such as instant, immediate, sudden.
Mutual synonyms
Related pairs
Both words in one sentence
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Hellgate: London Tormentors have a damage radius that may not be instant, but if multiples overlap it becomes quick enough to be virtually instantaneous.
Source: Instant Death Radius -
In Metal Gear Rising: Revengeance, Raiden can use this through an unlockable skill called "Quick Draw" which allows near-instantaneous draws, but doesn't help while fighting.
Source: Iaijutsu Practitioner
Cite this Source
Quick and Instantaneous. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/instantaneous/quick
Instantaneous & Quick. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/instantaneous/quick>.
Quick or Instantaneous. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/instantaneous/quick.
Google Ngram Viewer shows how "instantaneous" and "quick" have occurred on timeline