7
in haste(expression, idiom, adverb, fast, quickly)
6
in a flash(expression, idiom, adverb, directly, immediately)
6
straight away(verb, expression, adverb, phrasal verb, directly)
5
hurriedly(adverb, fast, quickly, rapidly, pronto)
5
in a jiffy(expression, idiom, adverb, directly, immediately)
5
in no time(expression, idiom, first, now, directly)
5
on the spot(expression, idiom, adverb, directly, immediately)
5
right now(expression, idiom, adverb, directly, immediately)
4
briefly(adverb, earliness, transiently)
4
fast(adjective, adverb, quickly, rapidly, pronto)
4
like a shot(expression, idiom, adverb, fast, quickly)
4
tout de suite(expression, idiom, adverb, directly, immediately)
3
at speed(adverb, fast, quickly, rapidly, pronto)
3
briskly(adverb, fast, quickly, rapidly, pronto)
3
chop-chop(adverb, fast, quickly, rapidly, pronto)
3
in a hurry(adverb, fast, quickly, rapidly, pronto)
3
in a rush(adverb, fast, quickly, rapidly, pronto)
3
like lighting(adverb, fast, quickly, rapidly, pronto)
3
readily
3
shot
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APASmart Define. (2015). instantaneously thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/instantaneously/thesaurus/synonyms
ChicagoSmart Define. 2015. "instantaneously thesaurus" https://smartdefine.org/instantaneously/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, instantaneously thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/instantaneously/thesaurus/synonyms>.
MLASmart Define. "instantaneously thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/instantaneously/thesaurus/synonyms>