3
swell(great, excellent, superb, super, groovy)
3
terrific(great, excellent, superb, super, groovy)
3
unbelievable(great, excellent, superb, super, groovy)
3
uncalculated(adjective, secret, unexpected, surprising, unanticipated)
3
undesigned(adjective, intention, unplanned, unintentional, accidental)
3
unheralded
3
unimaginable(great, excellent, superb, super, groovy)
3
unintended(adjective, chance, intention, unplanned, unintentional)
3
unsought
3
unthinkable(great, excellent, superb, super, groovy)
3
welcome(great, excellent, superb, super, groovy)
3
winning(great, excellent, superb, super, groovy)
2
arbitrary
2
exceptional(adjective, inexpectation)
2
fluky(adjective, chance, lucky, liable, unplanned)
2
freak
2
headlong(violent, fast, quick, abrupt, rapid)
2
incalculable(adjective, limitless, countless)
2
lucky
2
never thought of(verb, expression, phrasal verb, intention)
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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>