63 entries under adverb topic. ×

6
straight(directly, immediately, earliness)
6
summarily(delay, directly, immediately, rapidly)
5
abruptly(immediately, suddenly, unexpectedly, unawares)
5
expeditiously
5
tout de suite(expression, directly, immediately, rapidly)
4
apace
4
as soon as(verb, phrasal verb, moment, immediately)
4
short(early, rapidly, instantly, suddenly)
4
unhesitatingly(directly, immediately, rapidly, instantly)
3
right
3
shortly(now, directly, immediately, quickly)
3
this instant(expression, idiom, directly, rapidly)
3
this minute(expression, directly, immediately, rapidly)
3
without hesitation(expression, directly, immediately, rapidly)
2
first off(idiom, time)
2
in real time(expression, idiom)
2
incontinently
2
like a shot(expression, idiom)
2
presently
2
simultaneously
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APASmart Define. (2015). forthwith thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/forthwith/thesaurus/synonyms
ChicagoSmart Define. 2015. "forthwith thesaurus" https://smartdefine.org/forthwith/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, forthwith thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/forthwith/thesaurus/synonyms>.
MLASmart Define. "forthwith thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/forthwith/thesaurus/synonyms>