93 entries under adverb topic. ×

1
in a minute(expression, now, directly, immediately)
1
in a second(expression, idiom, directly, immediately)
1
in real time
1
instant(adjective, time, direct, prompt)
1
lickety split(expression, soon, swiftly, snappily)
1
more rapidly(expression, soon, swiftly, snappily)
1
posthaste(adjective, fast, quickly, rapidly)
1
punctually(freshly, seasonably)
1
thereupon(first, now, directly, immediately)
1
without warning(expression, soon, swiftly, snappily)
0
abruptly
0
at full tilt
0
at one fell swoop(expression, idiom, together)
0
at one go(expression, idiom, together)
0
at the double(expression, idiom, interjection, now)
0
at this instant(expression, idiom, immediately, straightaway)
0
bang
0
betimes(first, now, directly, immediately)
0
chop chop(expression, early, soon, swiftly)
0
in a beeline
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APASmart Define. (2015). at once thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/at_once/thesaurus/synonyms
ChicagoSmart Define. 2015. "at once thesaurus" https://smartdefine.org/at_once/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, at once thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/at_once/thesaurus/synonyms>.
MLASmart Define. "at once thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/at_once/thesaurus/synonyms>