5
improbable(great, excellent, superb, super, groovy)
5
impulsive(adjective, chance, thoughtless, shocking, unthinking)
5
instantaneous(adjective, sudden, surprising, earliness, inexpectation)
5
outlandish(adjective, unusual, strange, new, odd)
5
outstanding(adjective, great, excellent, unusual, strange)
5
random(adjective, careless, uncertain, chance, casual)
5
singular(adjective, extraordinary, unusual, strange, new)
5
unaccustomed(adjective, unusual, strange, new, odd)
5
unbelievable(great, excellent, superb, super, groovy)
5
unconventional(adjective, extraordinary, unusual, strange, new)
5
weird(adjective, extraordinary, unusual, strange, exceptional)
4
adventitious(adjective, chance, unplanned, unintentional, accidental)
4
beautiful(great, excellent, superb, super, groovy)
4
cute(great, excellent, superb, super, groovy)
4
eccentric(adjective, extraordinary, unusual, strange, new)
4
electrifying(adjective, surprising)
4
forced
4
haphazard(adjective, organization, plan, liable, dependent)
4
headlong(passionate, violent, fast, quick, thoughtless)
4
incidental(adjective, careless, chance, casual, arbitrary)
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APASmart Define. (2015). unexpected thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unexpected/thesaurus/synonyms
ChicagoSmart Define. 2015. "unexpected thesaurus" https://smartdefine.org/unexpected/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, unexpected thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unexpected/thesaurus/synonyms>.
MLASmart Define. "unexpected thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/unexpected/thesaurus/synonyms>