36 entries under instantly topic. ×

22
directly(noun, adverb, time, first, immediately)
19
promptly(noun, adverb, first, now, directly)
18
pronto(adverb, now, directly, immediately, quickly)
15
straight away(noun, verb, adverb, phrasal verb, directly)
13
forthwith(adverb, time, now, directly, immediately)
12
instantaneously(adverb, first, directly, immediately, quickly)
12
now(adverb, time, prompt, directly, immediately)
10
swiftly(adverb, directly, immediately, quickly, rapidly)
7
instanter(adverb, now, directly, immediately, quickly)
6
rapidly(adverb, directly, immediately, quickly)
5
soon(first, now, directly, immediately, rapidly)
5
summarily(adverb, first, now, directly, immediately)
5
without hesitation(expression, adverb, directly, immediately, easily)
4
expeditiously(adverb, directly, immediately, quickly, rapidly)
4
in a jiffy(noun, expression, idiom, adverb, directly)
4
on the spot(expression, idiom, adverb, directly, immediately)
4
tout de suite(expression, adjective, adverb, directly, immediately)
3
away(now, directly, immediately, rapidly)
3
this minute(expression, adverb, directly, immediately, rapidly)
2
in nothing flat(expression, idiom, directly, rapidly)
<12>
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APASmart Define. (2015). at once thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/at_once/thesaurus/synonyms
ChicagoSmart Define. 2015. "at once thesaurus" https://smartdefine.org/at_once/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, at once thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/at_once/thesaurus/synonyms>.
MLASmart Define. "at once thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/at_once/thesaurus/synonyms>