5 entries under unexpected topic. ×

9
unheralded(adjective, disclosed)
9
unanticipated(adjective, secret, unrevealed, disclosed)
7
unpredicted
2
without warning(expression, adjective)
1
impromptu
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APASmart Define. (2015). unannounced thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unannounced/thesaurus/synonyms
ChicagoSmart Define. 2015. "unannounced thesaurus" https://smartdefine.org/unannounced/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unannounced thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unannounced/thesaurus/synonyms>.
MLASmart Define. "unannounced thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/unannounced/thesaurus/synonyms>