Synonyms|69Antonyms|0|Broader|5Narrower|0Related|14
12
immediacy(noun, instantaneity, suddenness, timelessness)
6
immediateness
5
instancy
5
quickness(noun, suddenness)
3
alacrity
3
celerity
3
haste(noun, suddenness)
3
instantaneity(noun, instantaneity)
3
promptness
3
rapidity
3
transience(noun, transience)
2
dispatch
2
imperativeness
2
instant(noun, timelessness)
2
knot
2
speed
2
speediness
2
suddenness(noun, instantaneity, suddenness)
2
swiftness
1
abruptness
For more, visit Instantaneousness on Power Thesaurus
11 years ago|1.2k views|share |citing 
APASmart Define. (2015). instantaneousness thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/instantaneousness/thesaurus/synonyms
ChicagoSmart Define. 2015. "instantaneousness thesaurus" https://smartdefine.org/instantaneousness/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, instantaneousness thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/instantaneousness/thesaurus/synonyms>.
MLASmart Define. "instantaneousness thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/instantaneousness/thesaurus/synonyms>