9
expeditiously(adverb, quick, early, directly, quickly)
9
instanter(adverb, now, directly, immediately, quickly)
8
briskly(adverb, fast, quickly, rapidly, pronto)
8
early(adjective, adverb, time, timely, opportunely)
8
quick(adverb, prompt, early, directly, immediately)
7
in haste(adverb, fast, quickly, rapidly, pronto)
7
lickety-split
7
straightaway(adverb, first, now, directly, immediately)
7
summarily(adverb, delay, first, directly, immediately)
6
punctually(adverb, precisely, punctually)
6
abruptly(adverb, fast, quickly, rapidly, pronto)
6
betimes(adverb, time, early, timely, opportunely)
6
chop-chop(adverb, fast, quickly, rapidly, pronto)
6
now(adverb, directly, immediately, rapidly, instantly)
6
on the double(expression, idiom, adverb, now, directly)
6
posthaste(adjective, adverb, fast, quick, early)
6
without hesitation(adverb, straight, directly, immediately, easily)
5
in good time(adverb, time, early, timely, opportunely)
5
in no time(noun, expression, idiom, first, directly)
5
like a shot(expression, idiom, adverb, fast, quickly)
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APASmart Define. (2016). promptly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/promptly/thesaurus/synonyms
ChicagoSmart Define. 2016. "promptly thesaurus" https://smartdefine.org/promptly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, promptly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/promptly/thesaurus/synonyms>.
MLASmart Define. "promptly thesaurus" 21 March 2016. Web. 22 September 2026. <https://smartdefine.org/promptly/thesaurus/synonyms>