1
by chance
1
casual
1
chance
1
contrary to expectation(expression, idiom, inexpectation)
1
curious
1
electrifying
1
exceptional
1
fortuitous
1
frantic(violent, fast, quick)
1
from left field(expression, idiom, shocking, unpredictable, astonishing)
1
gone off half-cocked(expression, idiom, violent, fast, quick)
1
harum-scarum(violent, fast, quick)
1
heedless(violent, fast, quick)
1
hurried(violent, fast, quick, unexpected, sudden)
1
ill-advised(violent, fast, quick)
1
immediate
1
impatient(violent, fast, quick)
1
inadvertent
1
indiscreet(violent, fast, quick)
1
instantaneous
11 years ago|3.4k views|share |citing 
APASmart Define. (2015). unanticipated thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unanticipated/thesaurus/synonyms
ChicagoSmart Define. 2015. "unanticipated thesaurus" https://smartdefine.org/unanticipated/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unanticipated thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unanticipated/thesaurus/synonyms>.
MLASmart Define. "unanticipated thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/unanticipated/thesaurus/synonyms>