178 entries under adjective topic. ×

2
inadvertent(unplanned, unintentional, accidental, unintended)
2
inconceivable(extraordinary, unusual, strange, exceptional)
2
irregular(extraordinary, unusual, careless, strange)
2
kooky(unusual, strange)
2
novel(unusual, strange, new, unknown)
2
occasional(chance, unplanned, unpremeditated)
2
screwy(extraordinary, strange, exceptional, irregular)
2
spontaneous(careless, casual, thoughtless, impulsive)
2
striking
2
undesigned(unplanned, unintentional, accidental, unintended)
2
unhoped-for
2
unintended(chance, unplanned, unintentional, accidental)
2
unlucky
2
unprecedented
2
without warning(expression, violent, fast, quick)
1
snappy
1
Bohemian
1
circumstantial
1
coincidental(chance, unintentional, accidental, unintended)
1
fluke(noun, careless, casual, hazard)
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APASmart Define. (2015). unexpected thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unexpected/thesaurus/synonyms
ChicagoSmart Define. 2015. "unexpected thesaurus" https://smartdefine.org/unexpected/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unexpected thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unexpected/thesaurus/synonyms>.
MLASmart Define. "unexpected thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/unexpected/thesaurus/synonyms>