26 entries under immediate topic. ×

20
quick(adjective, prompt, fast, summary, speedy)
18
instant(adjective, time, direct, prompt, precise)
12
fast(adjective, direct, prompt, quick)
12
rapid(adjective, fast, precise, responsive, early)
10
momentary(adjective, brief, transient, instantaneity)
10
sudden(adjective, fast, summary, swift)
8
brief(adjective, fast, short, swift)
8
spontaneous(adjective, impulsive, sudden)
7
transitory(adjective, transient, transientness)
4
direct(adjective, prompt, fast, quick)
3
insistent(adjective, prompt, fast, quick)
3
present
2
clamant(adjective, prompt, fast, quick)
2
crying(prompt, fast, quick, urgent)
2
exigent(adjective, prompt, fast, quick)
2
hair-trigger
2
urgent(adjective, direct, prompt, fast, quick)
2
without delay(expression, idiom)
1
on-the-spot(adjective, prompt, fast, quick)
0
burning(prompt, fast, quick, urgent)
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APASmart Define. (2016). instantaneous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/instantaneous/thesaurus/synonyms
ChicagoSmart Define. 2016. "instantaneous thesaurus" https://smartdefine.org/instantaneous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, instantaneous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/instantaneous/thesaurus/synonyms>.
MLASmart Define. "instantaneous thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/instantaneous/thesaurus/synonyms>