10
unannounced(adjective, unexpected, disclosed)
8
unpredicted(adjective, unexpected)
6
unexpected(adjective, surprising)
4
eye-opening(adjective, amazing, astonishing, astounding, dumbfounding)
4
unanticipated(adjective, unexpected)
3
anonymous(adjective, unsung)
3
overlooked(adjective, covert, stealthy, unsung, unnoticed)
3
unforeseen
3
unknown(adjective, unsung)
2
extraordinary
2
surprise
2
unnoticed(adjective, unsung)
2
without warning(adjective, unexpected)
1
improbable
1
more than expected(expression, idiom)
1
obscure
1
out-of-the-way
1
past expectation
1
sudden
1
under the radar
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APASmart Define. (2015). unheralded thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unheralded/thesaurus/synonyms
ChicagoSmart Define. 2015. "unheralded thesaurus" https://smartdefine.org/unheralded/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, unheralded thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unheralded/thesaurus/synonyms>.
MLASmart Define. "unheralded thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/unheralded/thesaurus/synonyms>