4
on the double(expression, idiom, adverb, directly, immediately)
4
post-haste
4
straight away
4
tear off
3
absence of difficulty
3
at speed(adverb, fast, quickly, rapidly, pronto)
3
early(adjective, adverb, time, timely, opportunely)
3
flat-out(adverb, quick, immediately, quickly, rapidly)
3
full tilt(expression, adverb, quick, quickly, rapidly)
3
furiously(intensely, fiercely, hastily, wildly, enthusiastically)
3
hotfoot
3
impatiently(adverb, earnestly, hastily, promptly, enthusiastically)
3
in a hurry(adverb, fast, quickly, rapidly, pronto)
3
in a rush(adverb, fast, quickly, rapidly, pronto)
3
in good time(adverb, time, early, timely, opportunely)
3
instanter
3
like lighting(adverb, fast, quickly, rapidly, pronto)
3
p.d.q.
3
precipitately
3
presto(adverb, quickly, rapidly)
11 years ago|10k views|share |citing 
APASmart Define. (2015). speedily thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/speedily/thesaurus/synonyms
ChicagoSmart Define. 2015. "speedily thesaurus" https://smartdefine.org/speedily/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, speedily thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/speedily/thesaurus/synonyms>.
MLASmart Define. "speedily thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/speedily/thesaurus/synonyms>