178 entries under adjective topic. ×

10
unplanned(chance, impulsive, planned, unqualified)
9
casual(careless, chance, random, arbitrary)
9
hasty(passionate, violent, fast, quick)
9
rare(extraordinary, unusual, strange, exceptional)
9
unlooked-for(surprising, unforeseen, unanticipated, unpredicted)
8
swift(passionate, violent, fast, quick)
8
abnormal(unusual, exceptional, special, irregular)
8
amazing(great, excellent, unusual, strange)
8
bizarre(obscure, unusual, strange, new)
8
eye-opening(amazing, shocking, astonishing, astounding)
8
quick(passionate, violent, fast, abrupt)
8
uncommon(obscure, extraordinary, unusual, strange)
8
unfamiliar(unusual, strange, new, exceptional)
8
unheralded(surprising, unforeseen, unanticipated, unpredicted)
8
unpredictable(passionate, violent, uncertain, thoughtless)
7
peculiar(unusual, strange, new, exceptional)
7
precipitate(passionate, violent, thoughtless, impulsive)
6
astounding(great, excellent, superb, super)
6
atypical(extraordinary, unusual, strange, exceptional)
6
exceptional(extraordinary, unusual, strange, new)
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APASmart Define. (2015). unexpected thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/unexpected/thesaurus/synonyms
ChicagoSmart Define. 2015. "unexpected thesaurus" https://smartdefine.org/unexpected/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, unexpected thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/unexpected/thesaurus/synonyms>.
MLASmart Define. "unexpected thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/unexpected/thesaurus/synonyms>