16 entries under adverb topic. ×

10
unforeseen(adjective, surprise, unexpected, surprising)
10
unanticipated(adjective, surprise, unexpected, surprising)
5
unexpected(adjective, surprise, surprising, unpredicted)
4
not predicted(expression, unpredictable, surprising, unanticipated)
4
surprising(adjective, surprise, unexpected, unpredicted)
4
unexpectedly(adjective, unpredictable, surprising, subitaneous)
4
unplanned(adjective, surprise, unexpected, unprepared)
4
unprepared for(expression, unpredictable, surprising, unanticipated)
3
suddenly(adjective, surprising, not expected, not planned)
2
by chance(unexpected, unhoped, uncontemplated)
2
unpredicted(adjective, extraordinary, wonderful, shocking)
1
automatically(not expected, not planned, unhoped, uncontemplated)
1
sharply(not expected, not planned, unhoped, uncontemplated)
1
spontaneously(not expected, not planned, unhoped, uncontemplated)
1
unlikely(not expected, not planned, unhoped, uncontemplated)
1
untimely(not expected, not planned, unhoped, uncontemplated)
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APASmart Define. (2015). out of the blue thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/out_of_the_blue/thesaurus/synonyms
ChicagoSmart Define. 2015. "out of the blue thesaurus" https://smartdefine.org/out_of_the_blue/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, out of the blue thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/out_of_the_blue/thesaurus/synonyms>.
MLASmart Define. "out of the blue thesaurus" 3 August 2015. Web. 30 September 2026. <https://smartdefine.org/out_of_the_blue/thesaurus/synonyms>