Synonyms|261Antonyms|13|Broader|0Narrower|0Related|84

80 entries under fast topic. ×

5
speedy(adjective, adverb, hot, quick)
4
breakneck(adjective, adverb, hot, quick)
3
headlong(adjective, adverb, rapid, swift)
3
on the double(expression, idiom, hot, quick)
2
at once(expression, adjective, idiom, adverb)
2
directly(adjective, adverb)
2
expeditive(hot, quick, nimble, speedy)
2
express(quick, rapid, speedy, swift)
2
flat out(adverb, informal)
2
in nothing flat(expression, idiom, adverb, hot)
2
like a bat out of hell(expression, idiom, adverb, hot)
2
like a shot(expression, idiom, adverb, immediately)
2
pell-mell(adjective, adverb, carelessly, hurriedly)
2
straightaway(adjective, adverb)
1
ASAP(rapid, swift)
1
abrupt(adjective, rapid, swift)
1
accelerated(hot, quick, rapid, speedy)
1
active(adjective, hot, quick, nimble)
1
agile(adjective, hot, quick, nimble)
1
alert(adjective, rapid, swift)
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APASmart Define. (2015). posthaste thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/posthaste/thesaurus/synonyms
ChicagoSmart Define. 2015. "posthaste thesaurus" https://smartdefine.org/posthaste/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, posthaste thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/posthaste/thesaurus/synonyms>.
MLASmart Define. "posthaste thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/posthaste/thesaurus/synonyms>