73 entries under swift topic. ×

37
abrupt(adjective, keen, sharp, passionate, violent)
27
hasty(adjective, keen, energetic, passionate, violent)
25
unexpected(adjective, passionate, violent, careless, property)
22
quick(noun, adjective, passionate, violent, fast)
19
precipitate(noun, verb, adjective, sharp, passionate)
18
unforeseen(adjective, extraordinary, wonderful, quick, abrupt)
17
precipitous(adjective, sharp, violent, fast, quick)
16
impetuous(noun, adjective, keen, energetic, violent)
14
instantaneous(adjective, fast, summary, rapid)
13
fast(adjective, irritable, quick, abrupt, speedy)
12
headlong(noun, adjective, keen, sharp, passionate)
10
rapid(adjective, fast, quick, abrupt, speedy)
8
impulsive(noun, adjective, extraordinary, careless, wonderful)
8
brisk(adjective, fast, quick, rapid, speedy)
7
speedy(adjective, fast, quick, abrupt, rapid)
6
accelerated(adjective, fast, abrupt, rapid)
6
instant(adjective, prompt, irritable, summary, bad-tempered)
5
snappy(adjective, keen, energetic, violent, active)
3
breakneck(adjective, keen, sharp, energetic, active)
3
brief(fast, quick, speedy, immediate)
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APASmart Define. (2016). sudden thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sudden/thesaurus/synonyms
ChicagoSmart Define. 2016. "sudden thesaurus" https://smartdefine.org/sudden/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, sudden thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sudden/thesaurus/synonyms>.
MLASmart Define. "sudden thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/sudden/thesaurus/synonyms>