5
hurriedly(adverb, hastily, unexpectedly, impulsively, rashly)
5
swiftly
5
in a trice(expression, idiom, adverb, instantaneity)
5
unawares(adverb, unexpectedly, abruptly, ignorantly, inexpectation)
5
all of a sudden(expression, idiom, adverb, fast, unexpectedly)
5
in haste(expression, idiom, adverb)
5
of a sudden(expression, idiom, adverb)
5
presto(adjective, quickly, instantaneity)
5
rashly
5
recklessly
5
sharp(adverb, time)
4
short(adjective, adverb, fast, unexpectedly, unawares)
4
plump(adjective, adverb, directly, instantaneity, inexpectation)
4
at once(expression, idiom, adverb, instantaneity, earliness)
4
dead
4
aback(adverb, unexpectedly, unawares, abruptly)
4
apace
4
bang(adverb, right, straight, exactly, precisely)
4
by surprise(expression, adverb, unexpectedly, unawares, abruptly)
4
directly(adverb, earliness)
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APASmart Define. (2015). suddenly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/suddenly/thesaurus/synonyms
ChicagoSmart Define. 2015. "suddenly thesaurus" https://smartdefine.org/suddenly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, suddenly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/suddenly/thesaurus/synonyms>.
MLASmart Define. "suddenly thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/suddenly/thesaurus/synonyms>