Synonyms|159Antonyms|18|Broader|0Narrower|0Related|80
1
unanticipatedly(suddenly, unexpectedly, unawares, abruptly)
1
unconsciously(short, sudden, suddenly, unexpectedly, unawares)
1
unexpectedly(short, sudden, suddenly, unawares, abruptly)
1
unintentionally(short, sudden, suddenly, unexpectedly, unawares)
1
unknowingly(short, sudden, suddenly, unexpectedly, unawares)
1
unprepared(suddenly, unexpectedly, unawares, astonishingly, astoundingly)
1
unready(suddenly, unexpectedly, unawares, astonishingly, astoundingly)
1
unwittingly(short, sudden, suddenly, unexpectedly, unawares)
1
without warning(expression, suddenly, unexpectedly, unawares, abruptly)
0
amazed
0
abaci
0
abacus
0
abacuses
0
abnormally(adverb, unexpectedly, astonishingly, astoundingly, amazingly)
0
again
0
aghast
0
all at once
0
all of a sudden
0
anywise(adverb, unmindfully, inside-out)
0
approximately
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APASmart Define. (2015). aback thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/aback/thesaurus/synonyms
ChicagoSmart Define. 2015. "aback thesaurus" https://smartdefine.org/aback/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, aback thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/aback/thesaurus/synonyms>.
MLASmart Define. "aback thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/aback/thesaurus/synonyms>