12
instantly
11
briefly(adverb, transiently)
10
instantaneously(adverb, transiently)
9
immediately
8
fleetingly(adverb, transiently)
8
momently
8
quickly
8
transiently(adverb, briefly, transiently)
6
temporarily(adverb, briefly, transiently)
6
transitorily(adverb, transiently)
5
as fast as possible(expression, time, quick, now)
5
on the instant(expression, idiom, time, quick, now)
5
on the spot(expression, idiom, time, quick, now)
5
right away(expression, adverb, time, quick, now)
4
directly
4
now(adverb, presently)
4
any minute(expression, adverb, time, quick, now)
4
evanescently(adverb, transiently)
4
promptly
4
shortly
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APASmart Define. (2015). momentarily thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/momentarily/thesaurus/synonyms
ChicagoSmart Define. 2015. "momentarily thesaurus" https://smartdefine.org/momentarily/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, momentarily thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/momentarily/thesaurus/synonyms>.
MLASmart Define. "momentarily thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/momentarily/thesaurus/synonyms>