79 entries under rapidly topic. ×

29
quickly(adverb, fast, pronto, punctually)
25
speedily(adverb, time, fast, early, timely)
23
instantly(noun, adverb, early, now, directly)
22
without delay(noun, expression, idiom, adverb, directly)
21
directly(noun, adverb, fast, quickly)
21
swiftly(adverb, fast, quickly, pronto)
20
at once(noun, expression, idiom, adverb, now)
20
pronto(adjective, adverb, fast, immediately, quickly)
18
right away(noun, verb, expression, adverb, phrasal verb)
13
instantaneously(adverb, fast, quickly, pronto)
13
straight away(noun, verb, expression, adverb, phrasal verb)
13
fast(adjective, adverb, quickly, pronto)
12
soon(adverb, quick, directly, immediately, quickly)
12
forthwith(adverb, now, directly, immediately, quickly)
12
hastily(adverb, fast, quickly, pronto)
10
hurriedly(adverb, fast, quickly, pronto)
9
apace(adverb, fast, quickly, pronto)
9
expeditiously(adverb, quick, early, directly, quickly)
9
instanter(adverb, now, directly, immediately, quickly)
8
briskly(adverb, fast, quickly, pronto)
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APASmart Define. (2016). promptly thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/promptly/thesaurus/synonyms
ChicagoSmart Define. 2016. "promptly thesaurus" https://smartdefine.org/promptly/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, promptly thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/promptly/thesaurus/synonyms>.
MLASmart Define. "promptly thesaurus" 21 March 2016. Web. 26 September 2026. <https://smartdefine.org/promptly/thesaurus/synonyms>