8
surprise(noun, adjective, state, shock, amazing)
7
appealing(great, excellent, superb, super, groovy)
7
charming(great, excellent, superb, super, groovy)
7
fabulous(great, excellent, superb, super, groovy)
7
fantastic(great, excellent, superb, super, groovy)
7
incredible(great, excellent, superb, super, groovy)
7
lovely(great, excellent, superb, super, groovy)
7
marvelous(great, excellent, superb, super, groovy)
7
precipitate(adjective, unusual, quick, abrupt, rapid)
7
unintentional(adjective, chance, planned, intention, unplanned)
6
astonishing(adjective, great, excellent, superb, super)
6
astounding(adjective, great, excellent, superb, super)
6
contingent(adjective, chance, possible, liable, dependent)
6
unpredictable
5
happy
5
improbable(great, excellent, superb, super, groovy)
5
incidental(adjective, chance, lucky, liable, unplanned)
5
remarkable(adjective, great, excellent, superb, super)
5
spontaneous(chance, unplanned, accidental, unintended, unpremeditated)
5
unforeseeable(adjective, secret, liable, dependent, depending)
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APASmart Define. (2015). unforeseen thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unforeseen/thesaurus/synonyms
ChicagoSmart Define. 2015. "unforeseen thesaurus" https://smartdefine.org/unforeseen/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unforeseen thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unforeseen/thesaurus/synonyms>.
MLASmart Define. "unforeseen thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/unforeseen/thesaurus/synonyms>