38 entries under fast topic. ×

64
speedily(adverb, rapidly, hastily, earliness)
62
swiftly(adverb, rapidly, hastily, pronto)
56
rapidly(adverb, hastily, pronto)
44
promptly(adverb, immediately, rapidly, pronto)
28
hastily(adverb, rapidly, hastily, suddenly)
25
instantaneously(adverb, immediately, rapidly, suddenly)
24
directly(adverb, immediately, rapidly, earliness)
22
pronto(adjective, adverb, informal, immediately)
22
abruptly(adverb, rapidly, hastily, suddenly)
20
fast(verb, adjective, adverb, rapidly)
19
apace(adverb, rapidly, earliness, pronto)
17
lickety-split(adjective, adverb, informal)
16
hurriedly(adverb, rapidly, hastily, pronto)
16
briskly(adverb, rapidly, hastily, pronto)
12
quick(adjective, adverb, rapidly, soon)
10
chop-chop(adverb, rapidly, pronto)
9
like a shot(idiom, adverb, rapidly, pronto)
8
in haste(adverb, rapidly, pronto)
7
posthaste(adjective, adverb, immediately, rapidly)
6
at speed(adverb, rapidly, pronto)
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APASmart Define. (2016). quickly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/quickly/thesaurus/synonyms
ChicagoSmart Define. 2016. "quickly thesaurus" https://smartdefine.org/quickly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, quickly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/quickly/thesaurus/synonyms>.
MLASmart Define. "quickly thesaurus" 21 March 2016. Web. 22 September 2026. <https://smartdefine.org/quickly/thesaurus/synonyms>