80 entries under adverb topic. ×

16
suddenly(unexpected, suddenly, unawares, abruptly)
15
abruptly(short, sudden, suddenly, unawares)
8
surprisingly(short, sudden, suddenly, unawares)
7
hastily(suddenly, earliness)
7
by chance(expression, idiom, accident)
7
unawares(suddenly, abruptly, inexpectation)
6
accidentally(short, sudden, suddenly, casually)
6
without warning(expression, idiom, suddenly, unawares)
4
circumstantially
4
out of the blue
4
swiftly
4
hurriedly
4
plump
4
short(sudden, suddenly, unawares, abruptly)
3
perchance
3
quickly(suddenly, abruptly)
3
unanticipatedly(suddenly, unawares, abruptly)
3
unintentionally(short, sudden, suddenly, unawares)
3
unusually
2
instantaneously(suddenly, inexpectation)
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APASmart Define. (2015). unexpectedly thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unexpectedly/thesaurus/synonyms
ChicagoSmart Define. 2015. "unexpectedly thesaurus" https://smartdefine.org/unexpectedly/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unexpectedly thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unexpectedly/thesaurus/synonyms>.
MLASmart Define. "unexpectedly thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/unexpectedly/thesaurus/synonyms>