Synonyms|117Antonyms|62|Broader|19Narrower|18Related|120
3
sudden(adjective, unplanned, surprising, unforeseen, unanticipated)
3
surprising(adjective, sudden, unplanned, unforeseen, unanticipated)
3
unforeseen(adjective, sudden, unplanned, surprising, unanticipated)
3
unhoped-for(adjective, sudden, unplanned, surprising, unforeseen)
3
unplanned(adjective, sudden, surprising, unforeseen, unanticipated)
3
unscheduled(adjective, sudden, unplanned, surprising, unforeseen)
2
unanticipated(adjective, sudden, unplanned, surprising, unforeseen)
2
unhoped(adjective, sudden, unplanned, surprising, unforeseen)
2
unpredicted(adjective, sudden, unplanned, surprising, unforeseen)
2
unsuspected(adjective, sudden, unplanned, surprising, unforeseen)
2
unthought-of(adjective, sudden, unplanned, surprising, unforeseen)
1
forced(adjective, sudden, unplanned, surprising, unforeseen)
1
unannounced(adjective, sudden, unplanned, surprising, unforeseen)
1
unheralded(adjective, sudden, unplanned, surprising, unforeseen)
1
unlooked-for(adjective, sudden, unplanned, surprising, unforeseen)
1
unprovided for(adjective, sudden, unplanned, surprising, unforeseen)
1
unthought(adjective, sudden, unplanned, surprising, unforeseen)
0
just because
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APASmart Define. (2015). out of the blue thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/out_of_the_blue/thesaurus/narrower
ChicagoSmart Define. 2015. "out of the blue thesaurus" https://smartdefine.org/out_of_the_blue/thesaurus/narrower (accessed September 28, 2026).
HarvardSmart Define 2015, out of the blue thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/out_of_the_blue/thesaurus/narrower>.
MLASmart Define. "out of the blue thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/out_of_the_blue/thesaurus/narrower>