Instantaneous
Instantaneous adjective - Done or occurring without any noticeable lapse in time.
Sudden is a synonym for instantaneous. In some cases you can use "Sudden" instead an adjective "Instantaneous".
Sudden
Sudden adjective - Not expected.
Instantaneous is a synonym for sudden in immediate topic. You can use "Instantaneous" instead an adjective "Sudden".
Nearby Words: suddenly, suddenness
Mutual synonyms
Related pairs
- fast and instantaneous
- fast and sudden
- instant and instantaneous
- instant and sudden
- abrupt and instantaneous
- abrupt and sudden
- precipitous and instantaneous
- precipitous and sudden
- precipitate and instantaneous
- precipitate and sudden
- quick and instantaneous
- quick and sudden
- prompt and instantaneous
- prompt and sudden
Both words in one sentence
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There is realism in that the lasers are instantaneous, effectively undodgeable resulting in a Surprisingly Sudden Death, aren't instant-kill but need time to burn through armour and the Kavaznya one at least was supported by a nuclear plant.
Source: Frickin' Laser Beams
Cite this Source
Sudden and Instantaneous. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/instantaneous/sudden
Instantaneous & Sudden. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/instantaneous/sudden>.
Sudden or Instantaneous. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/instantaneous/sudden.
Google Ngram Viewer shows how "instantaneous" and "sudden" have occurred on timeline