14 entries under instantaneity topic. ×

24
abrupt(adjective, sharp, course, quick, impulsive)
14
sudden(adjective, sharp, violent, fast, quick)
12
hasty(adjective, violent, fast, quick, thoughtless)
11
precipitate(verb, adjective, sharp, fast, course)
10
precipitant(noun, adjective, violent, fierce, quick)
5
immediate(adjective, sudden)
4
instantaneous(adjective, sudden)
3
discontinuous
3
momentary(adjective, sudden)
2
instant
1
subitaneous(violent, fierce, quick, ardent, impulsive)
0
quick as lightning(expression, idiom)
0
quick as thought(expression, idiom)
0
rapid as electricity(expression, idiom)
11 years ago|5.7k views|share |citing 
APASmart Define. (2015). precipitous thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/precipitous/thesaurus/synonyms
ChicagoSmart Define. 2015. "precipitous thesaurus" https://smartdefine.org/precipitous/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, precipitous thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/precipitous/thesaurus/synonyms>.
MLASmart Define. "precipitous thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/precipitous/thesaurus/synonyms>