Synonyms|255Antonyms|109|Broader|5Narrower|0Related|117
3
sudden(adjective, suddenly, unexpectedly, unawares, abruptly)
3
this instant(expression, idiom, adverb, directly, rapidly)
3
this minute(expression, adverb, directly, immediately, rapidly)
3
time
3
without hesitation(expression, adverb, directly, immediately, rapidly)
2
all at once(expression, idiom)
2
at one time(expression, idiom)
2
briefly
2
direct
2
first off(idiom, adverb, time)
2
in no time(expression, idiom)
2
in nothing flat(expression, now, directly, immediately, rapidly)
2
in real time(expression, idiom, adverb)
2
incontinently(adverb, earliness)
2
like a shot(expression, idiom, adverb)
2
like now(expression, now, directly, immediately, rapidly)
2
presently
2
simultaneously
2
thereupon(adverb, directly, immediately, rapidly, instantly)
1
aback(suddenly, unexpectedly, unawares, abruptly)
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ChicagoSmart Define. 2015. "forthwith thesaurus" https://smartdefine.org/forthwith/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, forthwith thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/forthwith/thesaurus/synonyms>.
MLASmart Define. "forthwith thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/forthwith/thesaurus/synonyms>