17 entries under short topic. ×

3
by surprise(expression, idiom, adverb, prepared)
1
sudden(suddenly, unexpectedly, unawares, abruptly)
1
abruptly(adverb, unprepared, quickly, sudden)
1
accidentally(sudden, suddenly, unexpectedly, unawares)
1
by accident(expression, sudden, suddenly, unexpectedly)
1
by mistake(expression, sudden, suddenly, unexpectedly)
1
carelessly(sudden, suddenly, unexpectedly, unawares)
1
ignorantly(sudden, suddenly, unexpectedly, unawares)
1
inadvertently(sudden, suddenly, unexpectedly, unawares)
1
mistakenly(sudden, suddenly, unexpectedly, unawares)
1
off guard(expression, sudden, suddenly, unexpectedly)
1
surprisingly(sudden, suddenly, unexpectedly, unawares)
1
unconsciously(sudden, suddenly, unexpectedly, unawares)
1
unexpectedly(sudden, suddenly, unawares, abruptly)
1
unintentionally(sudden, suddenly, unexpectedly, unawares)
1
unknowingly(sudden, suddenly, unexpectedly, unawares)
1
unwittingly(sudden, suddenly, unexpectedly, unawares)
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APASmart Define. (2015). aback thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/aback/thesaurus/synonyms
ChicagoSmart Define. 2015. "aback thesaurus" https://smartdefine.org/aback/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, aback thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/aback/thesaurus/synonyms>.
MLASmart Define. "aback thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/aback/thesaurus/synonyms>