10 entries under posthaste topic. ×

7
swift(quickly, rapidly, snappily, speedily)
6
snappily(adverb, soon)
4
double-quick(adverb, soon, hastily, snappily, impulsively)
2
in double time(expression, idiom, adverb, soon, snappily)
2
in high gear(expression, idiom, adverb, soon, snappily)
1
chop chop(expression, adverb, soon, snappily)
1
double-time(adverb, directly, immediately, soon, instantly)
1
lickety split(expression, adverb, soon, snappily)
1
like a bat out of hell(expression, idiom, adverb, soon, snappily)
1
more rapidly(expression, adverb, soon, snappily)
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APASmart Define. (2016). swiftly thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/swiftly/thesaurus/synonyms
ChicagoSmart Define. 2016. "swiftly thesaurus" https://smartdefine.org/swiftly/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, swiftly thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/swiftly/thesaurus/synonyms>.
MLASmart Define. "swiftly thesaurus" 25 January 2016. Web. 25 September 2026. <https://smartdefine.org/swiftly/thesaurus/synonyms>