Synonyms|127Antonyms|68|Broader|22Narrower|7Related|87
3
out of the blue(expression, idiom, surprise, suddenly, not expected)
3
unannounced(adjective, sudden, not expected, not planned)
3
unawares(adjective, adverb, sudden, not expected, not planned)
2
ad-lib(adjective, sudden, not expected, not planned)
2
ad hoc(adjective, sudden, not expected, not planned)
2
adventitious(adjective, sudden, not expected, not planned)
2
automatic(noun, sudden, not expected, not planned)
2
automatically(adverb, sudden, not expected, not planned)
2
autopilot(noun, sudden, not expected, not planned)
2
extemporaneous(adjective, sudden, not expected, not planned)
2
extempore(adjective, sudden, not expected, not planned)
2
extemporize(verb, sudden, not expected, not planned)
2
impromptu(adjective, sudden, not expected, not planned)
2
improvident(adjective, sudden, not expected, not planned)
2
inadvertent(adjective, sudden, not expected, not planned)
2
inconceivable(adjective, sudden, not expected, not planned)
2
innocent(adjective, sudden, not expected, not planned)
2
instinctive(adjective, sudden, not expected, not planned)
2
involuntary(adjective, sudden, not expected, not planned)
2
muddle(noun, sudden, not expected, not planned)
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APASmart Define. (2015). as expected thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/as_expected/thesaurus/antonyms
ChicagoSmart Define. 2015. "as expected thesaurus" https://smartdefine.org/as_expected/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2015, as expected thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/as_expected/thesaurus/antonyms>.
MLASmart Define. "as expected thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/as_expected/thesaurus/antonyms>